- Timestamp:
- Mar 24, 2008, 2:43:42 AM (17 years ago)
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GPL/branches/uniaud-2.0/alsa-kernel/drivers/serial-u16550.c
r34 r305 1 1 /* 2 2 * serial.c 3 * Copyright (c) by Jaroslav Kysela <perex@ suse.cz>,3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, 4 4 * Isaku Yamahata <yamahata@private.email.ne.jp>, 5 5 * George Hansper <ghansper@apana.org.au>, … … 7 7 * 8 8 * This code is based on the code from ALSA 0.5.9, but heavily rewritten. 9 *10 * Sat Mar 31 17:27:57 PST 2001 tim.mann@compaq.com11 * Added support for the Midiator MS-124T and for the MS-124W in12 * Single Addressed (S/A) or Multiple Burst (M/B) mode, with13 * power derived either parasitically from the serial port or14 * from a separate power supply.15 *16 * The new snd_adaptor module parameter allows you to select17 * either the default Roland Soundcanvas support (0), which was18 * previously included in this driver but was not documented,19 * Midiator MS-124T support (1), Midiator MS-124W S/A mode20 * support (2), or MS-124W M/B mode support (3). For the21 * Midiator MS-124W, you must set the physical M-S and A-B22 * switches on the Midiator to match the driver mode you select.23 *24 * - In Roland Soundcanvas mode, multiple ALSA raw MIDI25 * substreams are supported (midiCnD0-midiCnD15). Whenever you26 * write to a different substream, the driver sends the27 * nonstandard MIDI command sequence F5 NN, where NN is the28 * substream number plus 1. Roland modules use this command to29 * switch between different "parts", so this feature lets you30 * treat each part as a distinct raw MIDI substream. The driver31 * provides no way to send F5 00 (no selection) or to not send32 * the F5 NN command sequence at all; perhaps it ought to.33 *34 * - In MS-124T mode, one raw MIDI substream is supported35 * (midiCnD0); the snd_outs module parameter is automatically set36 * to 1. The driver sends the same data to all four MIDI Out37 * connectors. Set the A-B switch and the snd_speed module38 * parameter to match (A=19200, B=9600).39 *40 * Usage example for MS-124T, with A-B switch in A position:41 * setserial /dev/ttyS0 uart none42 * /sbin/modprobe snd-card-serial snd_port=0x3f8 snd_irq=4 \43 * snd_adaptor=1 snd_speed=1920044 *45 * - In MS-124W S/A mode, one raw MIDI substream is supported46 * (midiCnD0); the snd_outs module parameter is automatically set47 * to 1. The driver sends the same data to all four MIDI Out48 * connectors at full MIDI speed.49 *50 * Usage example for S/A mode:51 * setserial /dev/ttyS0 uart none52 * /sbin/modprobe snd-card-serial snd_port=0x3f8 snd_irq=4 \53 * snd_adaptor=254 *55 * - In MS-124W M/B mode, the driver supports 16 ALSA raw MIDI56 * substreams; the snd_outs module parameter is automatically set57 * to 16. The substream number gives a bitmask of which MIDI Out58 * connectors the data should be sent to, with midiCnD1 sending59 * to Out 1, midiCnD2 to Out 2, midiCnD4 to Out 3, and midiCnD860 * to Out 4. Thus midiCnD15 sends the data to all 4 ports. As a61 * special case, midiCnD0 also sends to all ports, since it is62 * not useful to send the data to no ports. M/B mode has extra63 * overhead to select the MIDI Out for each byte, so the64 * aggregate data rate across all four MIDI Outs is at most one65 * byte every 520 us, as compared with the full MIDI data rate of66 * one byte every 320 us per port.67 *68 * Usage example for M/B mode:69 * setserial /dev/ttyS0 uart none70 * /sbin/insmod snd-card-serial snd_port=0x3f8 snd_irq=4 \71 * snd_adaptor=372 *73 * - The MS-124W hardware's M/A mode is currently not supported.74 * This mode allows the MIDI Outs to act independently at double75 * the aggregate throughput of M/B, but does not allow sending76 * the same byte simultaneously to multiple MIDI Outs. The M/A77 * protocol requires the driver to twiddle the modem control78 * lines under timing constraints, so it would be a bit more79 * complicated to implement than the other modes.80 *81 * - Midiator models other than MS-124W and MS-124T are currently82 * not supported. Note that the suffix letter is significant;83 * the MS-124 and MS-124B are not compatible, nor are the other84 * known models MS-101, MS-101B, MS-103, and MS-114. I do have85 * documentation that partially covers these models, but no units86 * to experiment with. The MS-124W support is tested with a real87 * unit. The MS-124T support is untested, but should work.88 9 * 89 10 * This program is free software; you can redistribute it and/or modify … … 99 20 * You should have received a copy of the GNU General Public License 100 21 * along with this program; if not, write to the Free Software 101 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 102 23 * 24 * Sat Mar 31 17:27:57 PST 2001 tim.mann@compaq.com 25 * Added support for the Midiator MS-124T and for the MS-124W in 26 * Single Addressed (S/A) or Multiple Burst (M/B) mode, with 27 * power derived either parasitically from the serial port or 28 * from a separate power supply. 29 * 30 * More documentation can be found in serial-u16550.txt. 103 31 */ 104 32 105 106 #define SNDRV_MAIN_OBJECT_FILE 107 108 #include <sound/driver.h> 33 #include <linux/init.h> 34 #include <linux/interrupt.h> 35 #include <linux/err.h> 36 #include <linux/platform_device.h> 37 #include <linux/slab.h> 38 #include <linux/ioport.h> 39 #include <linux/moduleparam.h> 40 #include <sound/core.h> 109 41 #include <sound/rawmidi.h> 110 #define SNDRV_GET_ID111 42 #include <sound/initval.h> 112 43 113 44 #include <linux/serial_reg.h> 114 115 EXPORT_NO_SYMBOLS; 116 MODULE_DESCRIPTION("MIDI serial"); 117 MODULE_CLASSES("{sound}"); 118 MODULE_DEVICES("{{ALSA, MIDI serial}}"); 45 #include <linux/jiffies.h> 46 47 #include <asm/io.h> 48 49 MODULE_DESCRIPTION("MIDI serial u16550"); 50 MODULE_LICENSE("GPL"); 51 MODULE_SUPPORTED_DEVICE("{{ALSA, MIDI serial u16550}}"); 119 52 120 53 #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ … … 122 55 #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ 123 56 #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ 124 #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_MS124W_MB 57 #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ 58 #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC 125 59 static char *adaptor_names[] = { 126 "Soundcanvas", 127 "MS-124T", 128 "MS-124W S/A", 129 "MS-124W M/B" 60 "Soundcanvas", 61 "MS-124T", 62 "MS-124W S/A", 63 "MS-124W M/B", 64 "Generic" 130 65 }; 131 66 132 static int snd_index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 133 static char *snd_id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 134 static int snd_enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 135 static long snd_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ 136 static int snd_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ 137 #ifdef TARGET_OS2 138 static int snd_speed[SNDRV_CARDS] = {REPEAT_SNDRV(38400)}; /* 9600,19200,38400,57600,115200 */ 139 static int snd_base[SNDRV_CARDS] = {REPEAT_SNDRV(115200)}; /* baud base */ 140 static int snd_outs[SNDRV_CARDS] = {REPEAT_SNDRV(1)}; /* 1 to 16 */ 141 static int snd_adaptor[SNDRV_CARDS] = {REPEAT_SNDRV(SNDRV_SERIAL_SOUNDCANVAS)}; 142 #else 143 static int snd_speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ 144 static int snd_base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ 145 static int snd_outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ 146 static int snd_adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; 147 #endif 148 149 MODULE_PARM(snd_index, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 150 MODULE_PARM_DESC(snd_index, "Index value for Serial MIDI."); 151 MODULE_PARM_SYNTAX(snd_index, SNDRV_INDEX_DESC); 152 MODULE_PARM(snd_id, "1-" __MODULE_STRING(SNDRV_CARDS) "s"); 153 MODULE_PARM_DESC(snd_id, "ID string for Serial MIDI."); 154 MODULE_PARM_SYNTAX(snd_id, SNDRV_ID_DESC); 155 MODULE_PARM(snd_enable, "1-" __MODULE_STRING(SNDRV_CARDS) "l"); 156 MODULE_PARM_DESC(snd_enable, "Enable UART16550A chip."); 157 MODULE_PARM_SYNTAX(snd_enable, SNDRV_ENABLE_DESC); 158 MODULE_PARM(snd_port, "1-" __MODULE_STRING(SNDRV_CARDS) "l"); 159 MODULE_PARM_DESC(snd_port, "Port # for UART16550A chip."); 160 MODULE_PARM_SYNTAX(snd_port, SNDRV_PORT12_DESC); 161 MODULE_PARM(snd_irq, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 162 MODULE_PARM_DESC(snd_irq, "IRQ # for UART16550A chip."); 163 MODULE_PARM_SYNTAX(snd_irq, SNDRV_IRQ_DESC); 164 MODULE_PARM(snd_speed, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 165 MODULE_PARM_DESC(snd_speed, "Speed in bauds."); 166 MODULE_PARM_SYNTAX(snd_speed, SNDRV_ENABLED ",allows:{9600,19200,38400,57600,115200},dialog:list"); 167 MODULE_PARM(snd_base, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 168 MODULE_PARM_DESC(snd_base, "Base for divisor in bauds."); 169 MODULE_PARM_SYNTAX(snd_base, SNDRV_ENABLED ",allows:{57600,115200,230400,460800},dialog:list"); 170 MODULE_PARM(snd_outs, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 171 MODULE_PARM_DESC(snd_outs, "Number of MIDI outputs."); 172 MODULE_PARM_SYNTAX(snd_outs, SNDRV_ENABLED ",allows:{{1,16}},dialog:list"); 173 MODULE_PARM(snd_adaptor, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); 174 MODULE_PARM_DESC(snd_adaptor, "Type of adaptor."); 175 MODULE_PARM_SYNTAX(snd_adaptor, SNDRV_ENABLED ",allows:{{0=Soundcanvas,1=MS-124T,2=MS-124W S/A,3=MS-124W M/B}},dialog:list"); 67 #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ 68 #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ 69 70 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 71 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 72 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 73 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ 74 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ 75 static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ 76 static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ 77 static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ 78 static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ 79 static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; 80 static int droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; 81 82 module_param_array(index, int, NULL, 0444); 83 MODULE_PARM_DESC(index, "Index value for Serial MIDI."); 84 module_param_array(id, charp, NULL, 0444); 85 MODULE_PARM_DESC(id, "ID string for Serial MIDI."); 86 module_param_array(enable, bool, NULL, 0444); 87 MODULE_PARM_DESC(enable, "Enable UART16550A chip."); 88 module_param_array(port, long, NULL, 0444); 89 MODULE_PARM_DESC(port, "Port # for UART16550A chip."); 90 module_param_array(irq, int, NULL, 0444); 91 MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); 92 module_param_array(speed, int, NULL, 0444); 93 MODULE_PARM_DESC(speed, "Speed in bauds."); 94 module_param_array(base, int, NULL, 0444); 95 MODULE_PARM_DESC(base, "Base for divisor in bauds."); 96 module_param_array(outs, int, NULL, 0444); 97 MODULE_PARM_DESC(outs, "Number of MIDI outputs."); 98 module_param_array(ins, int, NULL, 0444); 99 MODULE_PARM_DESC(ins, "Number of MIDI inputs."); 100 module_param_array(droponfull, bool, NULL, 0444); 101 MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); 102 103 module_param_array(adaptor, int, NULL, 0444); 104 MODULE_PARM_DESC(adaptor, "Type of adaptor."); 176 105 177 106 /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ 178 107 179 108 #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ 180 181 #define TX_BUFF_SIZE (1<<9) /* Must be 2^n */ 109 #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ 110 111 #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ 182 112 #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) 183 113 … … 188 118 #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) 189 119 190 typedef struct _snd_uart16550 { 191 snd_card_t *card; 192 snd_rawmidi_t *rmidi; 193 snd_rawmidi_substream_t *midi_output[SNDRV_SERIAL_MAX_OUTS]; 194 snd_rawmidi_substream_t *midi_input; 195 196 int filemode; //open status of file 197 198 spinlock_t open_lock; 199 200 int irq; 201 202 unsigned long base; 203 struct resource *res_base; 204 205 unsigned int speed; 206 unsigned int speed_base; 207 unsigned char divisor; 208 209 unsigned char old_divisor_lsb; 210 unsigned char old_divisor_msb; 211 unsigned char old_line_ctrl_reg; 212 213 // parameter for using of write loop 214 short int fifo_limit; //used in uart16550 215 short int fifo_count; //used in uart16550 216 217 // type of adaptor 218 int adaptor; 219 220 // outputs 221 int prev_out; 222 unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; 223 224 // write buffer and its writing/reading position 225 unsigned char tx_buff[TX_BUFF_SIZE]; 226 int buff_in_count; 227 int buff_in; 228 int buff_out; 229 230 // wait timer 231 unsigned int timer_running:1; 232 struct timer_list buffer_timer; 233 234 } snd_uart16550_t; 235 236 static snd_card_t *snd_serial_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; 237 238 inline static void snd_uart16550_add_timer(snd_uart16550_t *uart) 239 { 240 if (! uart->timer_running) { 241 /* timer 38600bps * 10bit * 16byte */ 242 uart->buffer_timer.expires = jiffies + (HZ+255)/256; 243 uart->timer_running = 1; 244 add_timer(&uart->buffer_timer); 245 } 246 } 247 248 inline static void snd_uart16550_del_timer(snd_uart16550_t *uart) 249 { 250 if (uart->timer_running) { 251 del_timer(&uart->buffer_timer); 252 uart->timer_running = 0; 253 } 120 struct snd_uart16550 { 121 struct snd_card *card; 122 struct snd_rawmidi *rmidi; 123 struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS]; 124 struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS]; 125 126 int filemode; /* open status of file */ 127 128 spinlock_t open_lock; 129 130 int irq; 131 132 unsigned long base; 133 struct resource *res_base; 134 135 unsigned int speed; 136 unsigned int speed_base; 137 unsigned char divisor; 138 139 unsigned char old_divisor_lsb; 140 unsigned char old_divisor_msb; 141 unsigned char old_line_ctrl_reg; 142 143 /* parameter for using of write loop */ 144 short int fifo_limit; /* used in uart16550 */ 145 short int fifo_count; /* used in uart16550 */ 146 147 /* type of adaptor */ 148 int adaptor; 149 150 /* inputs */ 151 int prev_in; 152 unsigned char rstatus; 153 154 /* outputs */ 155 int prev_out; 156 unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; 157 158 /* write buffer and its writing/reading position */ 159 unsigned char tx_buff[TX_BUFF_SIZE]; 160 int buff_in_count; 161 int buff_in; 162 int buff_out; 163 int drop_on_full; 164 165 /* wait timer */ 166 unsigned int timer_running:1; 167 struct timer_list buffer_timer; 168 169 }; 170 171 static struct platform_device *devices[SNDRV_CARDS]; 172 173 static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart) 174 { 175 if (!uart->timer_running) { 176 /* timer 38600bps * 10bit * 16byte */ 177 uart->buffer_timer.expires = jiffies + (HZ+255)/256; 178 uart->timer_running = 1; 179 add_timer(&uart->buffer_timer); 180 } 181 } 182 183 static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart) 184 { 185 if (uart->timer_running) { 186 del_timer(&uart->buffer_timer); 187 uart->timer_running = 0; 188 } 254 189 } 255 190 256 191 /* This macro is only used in snd_uart16550_io_loop */ 257 inline static void snd_uart16550_buffer_output(snd_uart16550_t *uart) 258 { 259 unsigned short buff_out = uart->buff_out; 260 outb(uart->tx_buff[buff_out], uart->base + UART_TX); 261 uart->fifo_count++; 262 buff_out++; 263 buff_out &= TX_BUFF_MASK; 264 uart->buff_out = buff_out; 265 uart->buff_in_count--; 192 static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart) 193 { 194 unsigned short buff_out = uart->buff_out; 195 if (uart->buff_in_count > 0) { 196 outb(uart->tx_buff[buff_out], uart->base + UART_TX); 197 uart->fifo_count++; 198 buff_out++; 199 buff_out &= TX_BUFF_MASK; 200 uart->buff_out = buff_out; 201 uart->buff_in_count--; 202 } 266 203 } 267 204 268 205 /* This loop should be called with interrupts disabled 269 * We don't want to interrupt this, 270 * as we're already handling an inter upt206 * We don't want to interrupt this, 207 * as we're already handling an interrupt 271 208 */ 272 static void snd_uart16550_io_loop(snd_uart16550_t * uart) 273 { 274 unsigned char c, status; 275 276 /* Read Loop */ 277 while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { 278 /* while receive data ready */ 279 c = inb(uart->base + UART_RX); 280 if (uart->filemode & SERIAL_MODE_INPUT_OPEN) { 281 snd_rawmidi_receive(uart->midi_input, &c, 1); 282 } 283 if (status & UART_LSR_OE) 284 snd_printk("%s: Overrun on device at 0x%lx\n", 285 uart->rmidi->name, uart->base); 286 } 287 288 /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, 289 buffer is never filled. */ 290 /* Check write status */ 291 if (status & UART_LSR_THRE) { 292 uart->fifo_count = 0; 293 } 294 if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { 295 /* Can't use FIFO, must send only when CTS is true */ 296 status = inb(uart->base + UART_MSR); 297 if (uart->fifo_count == 0 && (status & UART_MSR_CTS) 298 && uart->buff_in_count > 0) 299 snd_uart16550_buffer_output(uart); 300 } else { 301 /* Write loop */ 302 while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ 303 && uart->buff_in_count > 0) /* Do we want to? */ 304 snd_uart16550_buffer_output(uart); 305 } 306 if (uart->irq < 0 && uart->buff_in_count > 0) 307 snd_uart16550_add_timer(uart); 209 static void snd_uart16550_io_loop(struct snd_uart16550 * uart) 210 { 211 unsigned char c, status; 212 int substream; 213 214 /* recall previous stream */ 215 substream = uart->prev_in; 216 217 /* Read Loop */ 218 while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { 219 /* while receive data ready */ 220 c = inb(uart->base + UART_RX); 221 222 /* keep track of last status byte */ 223 if (c & 0x80) 224 uart->rstatus = c; 225 226 /* handle stream switch */ 227 if (uart->adaptor == SNDRV_SERIAL_GENERIC) { 228 if (uart->rstatus == 0xf5) { 229 if (c <= SNDRV_SERIAL_MAX_INS && c > 0) 230 substream = c - 1; 231 if (c != 0xf5) 232 /* prevent future bytes from being 233 interpreted as streams */ 234 uart->rstatus = 0; 235 } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) 236 && uart->midi_input[substream]) 237 snd_rawmidi_receive(uart->midi_input[substream], 238 &c, 1); 239 } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && 240 uart->midi_input[substream]) 241 snd_rawmidi_receive(uart->midi_input[substream], &c, 1); 242 243 if (status & UART_LSR_OE) 244 snd_printk("%s: Overrun on device at 0x%lx\n", 245 uart->rmidi->name, uart->base); 246 } 247 248 /* remember the last stream */ 249 uart->prev_in = substream; 250 251 /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, 252 buffer is never filled. */ 253 /* Check write status */ 254 if (status & UART_LSR_THRE) 255 uart->fifo_count = 0; 256 if (uart->adaptor == SNDRV_SERIAL_MS124W_SA 257 || uart->adaptor == SNDRV_SERIAL_GENERIC) { 258 /* Can't use FIFO, must send only when CTS is true */ 259 status = inb(uart->base + UART_MSR); 260 while (uart->fifo_count == 0 && (status & UART_MSR_CTS) && 261 uart->buff_in_count > 0) { 262 snd_uart16550_buffer_output(uart); 263 status = inb(uart->base + UART_MSR); 264 } 265 } else { 266 /* Write loop */ 267 while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ 268 && uart->buff_in_count > 0) /* Do we want to? */ 269 snd_uart16550_buffer_output(uart); 270 } 271 if (uart->irq < 0 && uart->buff_in_count > 0) 272 snd_uart16550_add_timer(uart); 308 273 } 309 274 … … 311 276 * --------------------------- 312 277 * After receiving a interrupt, it is important to indicate to the UART that 313 * this has been done. 314 * For a Rx inter upt, this is done by reading the received byte.315 * For a Tx inter upt this is done by either:278 * this has been done. 279 * For a Rx interrupt, this is done by reading the received byte. 280 * For a Tx interrupt this is done by either: 316 281 * a) Writing a byte 317 282 * b) Reading the IIR 318 * It is particularly important to read the IIR if a Tx inter upt is received283 * It is particularly important to read the IIR if a Tx interrupt is received 319 284 * when there is no data in tx_buff[], as in this case there no other 320 * indication that the inter upt has been serviced, and it remains outstanding321 * indefinitely. This has the curious side effect that and no further inter upts285 * indication that the interrupt has been serviced, and it remains outstanding 286 * indefinitely. This has the curious side effect that and no further interrupts 322 287 * will be generated from this device AT ALL!!. 323 * It is also desirable to clear outstanding inter upts when the device is288 * It is also desirable to clear outstanding interrupts when the device is 324 289 * opened/closed. 325 290 * … … 328 293 * interrupts at all. (Possibly tied to an internal pull-up on CTS?) 329 294 */ 330 static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id, struct pt_regs *regs) 331 { 332 snd_uart16550_t *uart; 333 334 uart = (snd_uart16550_t *) dev_id; 335 spin_lock(&uart->open_lock); 336 if (uart->filemode == SERIAL_MODE_NOT_OPENED) { 337 spin_unlock(&uart->open_lock); 338 return IRQ_HANDLED; 339 } 340 inb(uart->base + UART_IIR); /* indicate to the UART that the interupt has been serviced */ 341 snd_uart16550_io_loop(uart); 342 spin_unlock(&uart->open_lock); 343 return IRQ_HANDLED; 295 static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) 296 { 297 struct snd_uart16550 *uart; 298 299 uart = dev_id; 300 spin_lock(&uart->open_lock); 301 if (uart->filemode == SERIAL_MODE_NOT_OPENED) { 302 spin_unlock(&uart->open_lock); 303 return IRQ_NONE; 304 } 305 /* indicate to the UART that the interrupt has been serviced */ 306 inb(uart->base + UART_IIR); 307 snd_uart16550_io_loop(uart); 308 spin_unlock(&uart->open_lock); 309 return IRQ_HANDLED; 344 310 } 345 311 … … 347 313 static void snd_uart16550_buffer_timer(unsigned long data) 348 314 { 349 snd_uart16550_t *uart; 350 351 uart = (snd_uart16550_t *)data; 352 spin_lock(&uart->open_lock); 353 snd_uart16550_del_timer(uart); 354 snd_uart16550_io_loop(uart); 355 spin_unlock(&uart->open_lock); 315 unsigned long flags; 316 struct snd_uart16550 *uart; 317 318 uart = (struct snd_uart16550 *)data; 319 spin_lock_irqsave(&uart->open_lock, flags); 320 snd_uart16550_del_timer(uart); 321 snd_uart16550_io_loop(uart); 322 spin_unlock_irqrestore(&uart->open_lock, flags); 356 323 } 357 324 … … 361 328 * return negative error if not found 362 329 */ 363 static int __init snd_uart16550_detect(unsigned int io_base) 364 { 365 int ok; 366 unsigned char c; 367 368 if (check_region(io_base, 8)) 369 return -EBUSY; 370 371 /* Do some vague tests for the presence of the uart */ 372 if (io_base == 0) 373 return -ENODEV; /* Not configured */ 374 375 ok = 1; /* uart detected unless one of the following tests should fail */ 376 /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ 377 outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ 378 c = inb(io_base + UART_IER); 379 /* The top four bits of the IER should always == 0 */ 380 if ((c & 0xf0) != 0) 381 ok = 0; /* failed */ 382 383 outb(0xaa, io_base + UART_SCR); 384 /* Write arbitrary data into the scratch reg */ 385 c = inb(io_base + UART_SCR); 386 /* If it comes back, it's OK */ 387 if (c != 0xaa) 388 ok = 0; /* failed */ 389 390 outb(0x55, io_base + UART_SCR); 391 /* Write arbitrary data into the scratch reg */ 392 c = inb(io_base + UART_SCR); 393 /* If it comes back, it's OK */ 394 if (c != 0x55) 395 ok = 0; /* failed */ 396 397 return ok; 398 } 399 400 static void snd_uart16550_do_open(snd_uart16550_t * uart) 401 { 402 char byte; 403 404 /* Initialize basic variables */ 405 uart->buff_in_count = 0; 406 uart->buff_in = 0; 407 uart->buff_out = 0; 408 uart->fifo_limit = 1; 409 uart->fifo_count = 0; 410 uart->timer_running = 0; 411 412 outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ 413 | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ 414 | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ 415 | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ 416 /* NOTE: interupt generated after T=(time)4-bytes 417 * if less than UART_FCR_TRIGGER bytes received 418 */ 419 ,uart->base + UART_FCR); /* FIFO Control Register */ 420 421 if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) 422 uart->fifo_limit = 16; 423 if (uart->divisor != 0) { 424 uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); 425 outb(UART_LCR_DLAB /* Divisor latch access bit */ 426 ,uart->base + UART_LCR); /* Line Control Register */ 427 uart->old_divisor_lsb = inb(uart->base + UART_DLL); 428 uart->old_divisor_msb = inb(uart->base + UART_DLM); 429 430 outb(uart->divisor 431 ,uart->base + UART_DLL); /* Divisor Latch Low */ 432 outb(0 433 ,uart->base + UART_DLM); /* Divisor Latch High */ 434 /* DLAB is reset to 0 in next outb() */ 435 } 436 /* Set serial parameters (parity off, etc) */ 437 outb(UART_LCR_WLEN8 /* 8 data-bits */ 438 | 0 /* 1 stop-bit */ 439 | 0 /* parity off */ 440 | 0 /* DLAB = 0 */ 441 ,uart->base + UART_LCR); /* Line Control Register */ 442 443 switch (uart->adaptor) { 444 default: 445 outb(UART_MCR_RTS /* Set Request-To-Send line active */ 446 | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ 447 | UART_MCR_OUT2 /* Set OUT2 - not always required, but when 448 * it is, it is ESSENTIAL for enabling interrupts 449 */ 450 ,uart->base + UART_MCR); /* Modem Control Register */ 451 break; 452 case SNDRV_SERIAL_MS124W_SA: 453 case SNDRV_SERIAL_MS124W_MB: 454 /* MS-124W can draw power from RTS and DTR if they 455 are in opposite states. */ 456 outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, 457 uart->base + UART_MCR); 458 break; 459 case SNDRV_SERIAL_MS124T: 460 /* MS-124T can draw power from RTS and/or DTR (preferably 461 both) if they are both asserted. */ 462 outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, 463 uart->base + UART_MCR); 464 break; 465 } 466 467 if (uart->irq < 0) { 468 byte = (0 & UART_IER_RDI) /* Disable Receiver data interupt */ 469 |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interupt */ 470 ; 471 } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { 472 byte = UART_IER_RDI /* Enable Receiver data interrupt */ 473 | UART_IER_MSI /* Enable Modem status interrupt */ 474 ; 475 } else { 476 byte = UART_IER_RDI /* Enable Receiver data interupt */ 477 | UART_IER_THRI /* Enable Transmitter holding register empty interupt */ 478 ; 479 } 480 outb(byte, uart->base + UART_IER); /* Interupt enable Register */ 481 482 inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ 483 inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ 484 inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ 485 } 486 487 static void snd_uart16550_do_close(snd_uart16550_t * uart) 488 { 489 if (uart->irq < 0) 490 snd_uart16550_del_timer(uart); 491 492 /* NOTE: may need to disable interrupts before de-registering out handler. 493 * For now, the consequences are harmless. 494 */ 495 496 outb((0 & UART_IER_RDI) /* Disable Receiver data interupt */ 497 |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interupt */ 498 ,uart->base + UART_IER); /* Interupt enable Register */ 499 500 switch (uart->adaptor) { 501 default: 502 outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ 503 |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ 504 |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ 505 ,uart->base + UART_MCR); /* Modem Control Register */ 506 break; 507 case SNDRV_SERIAL_MS124W_SA: 508 case SNDRV_SERIAL_MS124W_MB: 509 /* MS-124W can draw power from RTS and DTR if they 510 are in opposite states; leave it powered. */ 511 outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), 512 uart->base + UART_MCR); 513 break; 514 case SNDRV_SERIAL_MS124T: 515 /* MS-124T can draw power from RTS and/or DTR (preferably 516 both) if they are both asserted; leave it powered. */ 517 outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), 518 uart->base + UART_MCR); 519 break; 520 } 521 522 inb(uart->base + UART_IIR); /* Clear any outstanding interupts */ 523 524 /* Restore old divisor */ 525 if (uart->divisor != 0) { 526 outb(UART_LCR_DLAB /* Divisor latch access bit */ 527 ,uart->base + UART_LCR); /* Line Control Register */ 528 outb(uart->old_divisor_lsb 529 ,uart->base + UART_DLL); /* Divisor Latch Low */ 530 outb(uart->old_divisor_msb 531 ,uart->base + UART_DLM); /* Divisor Latch High */ 532 /* Restore old LCR (data bits, stop bits, parity, DLAB) */ 533 outb(uart->old_line_ctrl_reg 534 ,uart->base + UART_LCR); /* Line Control Register */ 535 } 536 } 537 538 static int snd_uart16550_input_open(snd_rawmidi_substream_t * substream) 539 { 540 unsigned long flags; 541 snd_uart16550_t *uart = substream->rmidi->private_data; 542 543 spin_lock_irqsave(&uart->open_lock, flags); 544 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 545 snd_uart16550_do_open(uart); 546 uart->filemode |= SERIAL_MODE_INPUT_OPEN; 547 uart->midi_input = substream; 548 spin_unlock_irqrestore(&uart->open_lock, flags); 549 return 0; 550 } 551 552 static int snd_uart16550_input_close(snd_rawmidi_substream_t * substream) 553 { 554 unsigned long flags; 555 snd_uart16550_t *uart = substream->rmidi->private_data; 556 557 spin_lock_irqsave(&uart->open_lock, flags); 558 uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; 559 uart->midi_input = NULL; 560 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 561 snd_uart16550_do_close(uart); 562 spin_unlock_irqrestore(&uart->open_lock, flags); 563 return 0; 564 } 565 566 static void snd_uart16550_input_trigger(snd_rawmidi_substream_t * substream, int up) 567 { 568 unsigned long flags; 569 snd_uart16550_t *uart = substream->rmidi->private_data; 570 571 spin_lock_irqsave(&uart->open_lock, flags); 572 if (up) { 573 uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; 574 } else { 575 uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; 576 } 577 spin_unlock_irqrestore(&uart->open_lock, flags); 578 } 579 580 static int snd_uart16550_output_open(snd_rawmidi_substream_t * substream) 581 { 582 unsigned long flags; 583 snd_uart16550_t *uart = substream->rmidi->private_data; 584 585 spin_lock_irqsave(&uart->open_lock, flags); 586 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 587 snd_uart16550_do_open(uart); 588 uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; 589 uart->midi_output[substream->number] = substream; 590 spin_unlock_irqrestore(&uart->open_lock, flags); 591 return 0; 330 static int __devinit snd_uart16550_detect(struct snd_uart16550 *uart) 331 { 332 unsigned long io_base = uart->base; 333 int ok; 334 unsigned char c; 335 336 /* Do some vague tests for the presence of the uart */ 337 if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { 338 return -ENODEV; /* Not configured */ 339 } 340 341 uart->res_base = request_region(io_base, 8, "Serial MIDI"); 342 if (uart->res_base == NULL) { 343 snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); 344 return -EBUSY; 345 } 346 347 /* uart detected unless one of the following tests should fail */ 348 ok = 1; 349 /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ 350 outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ 351 c = inb(io_base + UART_IER); 352 /* The top four bits of the IER should always == 0 */ 353 if ((c & 0xf0) != 0) 354 ok = 0; /* failed */ 355 356 outb(0xaa, io_base + UART_SCR); 357 /* Write arbitrary data into the scratch reg */ 358 c = inb(io_base + UART_SCR); 359 /* If it comes back, it's OK */ 360 if (c != 0xaa) 361 ok = 0; /* failed */ 362 363 outb(0x55, io_base + UART_SCR); 364 /* Write arbitrary data into the scratch reg */ 365 c = inb(io_base + UART_SCR); 366 /* If it comes back, it's OK */ 367 if (c != 0x55) 368 ok = 0; /* failed */ 369 370 return ok; 371 } 372 373 static void snd_uart16550_do_open(struct snd_uart16550 * uart) 374 { 375 char byte; 376 377 /* Initialize basic variables */ 378 uart->buff_in_count = 0; 379 uart->buff_in = 0; 380 uart->buff_out = 0; 381 uart->fifo_limit = 1; 382 uart->fifo_count = 0; 383 uart->timer_running = 0; 384 385 outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ 386 | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ 387 | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ 388 | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ 389 /* NOTE: interrupt generated after T=(time)4-bytes 390 * if less than UART_FCR_TRIGGER bytes received 391 */ 392 ,uart->base + UART_FCR); /* FIFO Control Register */ 393 394 if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) 395 uart->fifo_limit = 16; 396 if (uart->divisor != 0) { 397 uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); 398 outb(UART_LCR_DLAB /* Divisor latch access bit */ 399 ,uart->base + UART_LCR); /* Line Control Register */ 400 uart->old_divisor_lsb = inb(uart->base + UART_DLL); 401 uart->old_divisor_msb = inb(uart->base + UART_DLM); 402 403 outb(uart->divisor 404 ,uart->base + UART_DLL); /* Divisor Latch Low */ 405 outb(0 406 ,uart->base + UART_DLM); /* Divisor Latch High */ 407 /* DLAB is reset to 0 in next outb() */ 408 } 409 /* Set serial parameters (parity off, etc) */ 410 outb(UART_LCR_WLEN8 /* 8 data-bits */ 411 | 0 /* 1 stop-bit */ 412 | 0 /* parity off */ 413 | 0 /* DLAB = 0 */ 414 ,uart->base + UART_LCR); /* Line Control Register */ 415 416 switch (uart->adaptor) { 417 default: 418 outb(UART_MCR_RTS /* Set Request-To-Send line active */ 419 | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ 420 | UART_MCR_OUT2 /* Set OUT2 - not always required, but when 421 * it is, it is ESSENTIAL for enabling interrupts 422 */ 423 ,uart->base + UART_MCR); /* Modem Control Register */ 424 break; 425 case SNDRV_SERIAL_MS124W_SA: 426 case SNDRV_SERIAL_MS124W_MB: 427 /* MS-124W can draw power from RTS and DTR if they 428 are in opposite states. */ 429 outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, 430 uart->base + UART_MCR); 431 break; 432 case SNDRV_SERIAL_MS124T: 433 /* MS-124T can draw power from RTS and/or DTR (preferably 434 both) if they are both asserted. */ 435 outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, 436 uart->base + UART_MCR); 437 break; 438 } 439 440 if (uart->irq < 0) { 441 byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ 442 |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ 443 ; 444 } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { 445 byte = UART_IER_RDI /* Enable Receiver data interrupt */ 446 | UART_IER_MSI /* Enable Modem status interrupt */ 447 ; 448 } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { 449 byte = UART_IER_RDI /* Enable Receiver data interrupt */ 450 | UART_IER_MSI /* Enable Modem status interrupt */ 451 | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ 452 ; 453 } else { 454 byte = UART_IER_RDI /* Enable Receiver data interrupt */ 455 | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ 456 ; 457 } 458 outb(byte, uart->base + UART_IER); /* Interrupt enable Register */ 459 460 inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ 461 inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ 462 inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ 463 } 464 465 static void snd_uart16550_do_close(struct snd_uart16550 * uart) 466 { 467 if (uart->irq < 0) 468 snd_uart16550_del_timer(uart); 469 470 /* NOTE: may need to disable interrupts before de-registering out handler. 471 * For now, the consequences are harmless. 472 */ 473 474 outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ 475 |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ 476 ,uart->base + UART_IER); /* Interrupt enable Register */ 477 478 switch (uart->adaptor) { 479 default: 480 outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ 481 |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ 482 |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ 483 ,uart->base + UART_MCR); /* Modem Control Register */ 484 break; 485 case SNDRV_SERIAL_MS124W_SA: 486 case SNDRV_SERIAL_MS124W_MB: 487 /* MS-124W can draw power from RTS and DTR if they 488 are in opposite states; leave it powered. */ 489 outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), 490 uart->base + UART_MCR); 491 break; 492 case SNDRV_SERIAL_MS124T: 493 /* MS-124T can draw power from RTS and/or DTR (preferably 494 both) if they are both asserted; leave it powered. */ 495 outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), 496 uart->base + UART_MCR); 497 break; 498 } 499 500 inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ 501 502 /* Restore old divisor */ 503 if (uart->divisor != 0) { 504 outb(UART_LCR_DLAB /* Divisor latch access bit */ 505 ,uart->base + UART_LCR); /* Line Control Register */ 506 outb(uart->old_divisor_lsb 507 ,uart->base + UART_DLL); /* Divisor Latch Low */ 508 outb(uart->old_divisor_msb 509 ,uart->base + UART_DLM); /* Divisor Latch High */ 510 /* Restore old LCR (data bits, stop bits, parity, DLAB) */ 511 outb(uart->old_line_ctrl_reg 512 ,uart->base + UART_LCR); /* Line Control Register */ 513 } 514 } 515 516 static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) 517 { 518 unsigned long flags; 519 struct snd_uart16550 *uart = substream->rmidi->private_data; 520 521 spin_lock_irqsave(&uart->open_lock, flags); 522 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 523 snd_uart16550_do_open(uart); 524 uart->filemode |= SERIAL_MODE_INPUT_OPEN; 525 uart->midi_input[substream->number] = substream; 526 spin_unlock_irqrestore(&uart->open_lock, flags); 527 return 0; 528 } 529 530 static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream) 531 { 532 unsigned long flags; 533 struct snd_uart16550 *uart = substream->rmidi->private_data; 534 535 spin_lock_irqsave(&uart->open_lock, flags); 536 uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; 537 uart->midi_input[substream->number] = NULL; 538 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 539 snd_uart16550_do_close(uart); 540 spin_unlock_irqrestore(&uart->open_lock, flags); 541 return 0; 542 } 543 544 static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, 545 int up) 546 { 547 unsigned long flags; 548 struct snd_uart16550 *uart = substream->rmidi->private_data; 549 550 spin_lock_irqsave(&uart->open_lock, flags); 551 if (up) 552 uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; 553 else 554 uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; 555 spin_unlock_irqrestore(&uart->open_lock, flags); 556 } 557 558 static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) 559 { 560 unsigned long flags; 561 struct snd_uart16550 *uart = substream->rmidi->private_data; 562 563 spin_lock_irqsave(&uart->open_lock, flags); 564 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 565 snd_uart16550_do_open(uart); 566 uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; 567 uart->midi_output[substream->number] = substream; 568 spin_unlock_irqrestore(&uart->open_lock, flags); 569 return 0; 592 570 }; 593 571 594 static int snd_uart16550_output_close(s nd_rawmidi_substream_t *substream)595 { 596 597 snd_uart16550_t*uart = substream->rmidi->private_data;598 599 600 601 602 603 604 605 572 static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream) 573 { 574 unsigned long flags; 575 struct snd_uart16550 *uart = substream->rmidi->private_data; 576 577 spin_lock_irqsave(&uart->open_lock, flags); 578 uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; 579 uart->midi_output[substream->number] = NULL; 580 if (uart->filemode == SERIAL_MODE_NOT_OPENED) 581 snd_uart16550_do_close(uart); 582 spin_unlock_irqrestore(&uart->open_lock, flags); 583 return 0; 606 584 }; 607 585 608 inline static void snd_uart16550_write_buffer(snd_uart16550_t *uart, unsigned char byte) 609 { 610 unsigned short buff_in = uart->buff_in; 611 uart->tx_buff[buff_in] = byte; 612 buff_in++; 613 buff_in &= TX_BUFF_MASK; 614 uart->buff_in = buff_in; 615 uart->buff_in_count++; 616 if (uart->irq < 0) /* polling mode */ 617 snd_uart16550_add_timer(uart); 618 } 619 620 static void snd_uart16550_output_byte(snd_uart16550_t *uart, snd_rawmidi_substream_t * substream, unsigned char midi_byte) 621 { 622 if (uart->buff_in_count == 0 /* Buffer empty? */ 623 && (uart->adaptor != SNDRV_SERIAL_MS124W_SA || 624 (uart->fifo_count == 0 /* FIFO empty? */ 625 && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ 626 627 /* Tx Buffer Empty - try to write immediately */ 628 if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { 629 /* Transmitter holding register (and Tx FIFO) empty */ 630 uart->fifo_count = 1; 631 outb(midi_byte, uart->base + UART_TX); 632 } else { 633 if (uart->fifo_count < uart->fifo_limit) { 634 uart->fifo_count++; 635 outb(midi_byte, uart->base + UART_TX); 636 } else { 637 /* Cannot write (buffer empty) - put char in buffer */ 638 snd_uart16550_write_buffer(uart, midi_byte); 639 } 640 } 641 } else { 642 if (uart->buff_in_count >= TX_BUFF_SIZE) { 643 snd_printk("%s: Buffer overrun on device at 0x%lx\n", 644 uart->rmidi->name, uart->base); 645 return; 646 } 647 snd_uart16550_write_buffer(uart, midi_byte); 648 } 649 } 650 651 static void snd_uart16550_output_write(snd_rawmidi_substream_t * substream) 652 { 653 unsigned long flags; 654 unsigned char midi_byte, addr_byte; 655 snd_uart16550_t *uart = substream->rmidi->private_data; 656 char first; 657 658 /* Interupts are disabled during the updating of the tx_buff, 659 * since it is 'bad' to have two processes updating the same 660 * variables (ie buff_in & buff_out) 661 */ 662 663 spin_lock_irqsave(&uart->open_lock, flags); 664 665 if (uart->irq < 0) //polling 666 snd_uart16550_io_loop(uart); 667 668 if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { 669 while (1) { 670 /* buffer full? */ 671 /* in this mode we need two bytes of space */ 672 if (uart->buff_in_count > TX_BUFF_SIZE - 2) 673 break; 674 if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) 675 break; 676 #if SNDRV_SERIAL_MS124W_MB_NOCOMBO 677 /* select exactly one of the four ports */ 678 addr_byte = (1 << (substream->number + 4)) | 0x08; 586 static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart, 587 int Num) 588 { 589 if (uart->buff_in_count + Num < TX_BUFF_SIZE) 590 return 1; 591 else 592 return 0; 593 } 594 595 static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart, 596 unsigned char byte) 597 { 598 unsigned short buff_in = uart->buff_in; 599 if (uart->buff_in_count < TX_BUFF_SIZE) { 600 uart->tx_buff[buff_in] = byte; 601 buff_in++; 602 buff_in &= TX_BUFF_MASK; 603 uart->buff_in = buff_in; 604 uart->buff_in_count++; 605 if (uart->irq < 0) /* polling mode */ 606 snd_uart16550_add_timer(uart); 607 return 1; 608 } else 609 return 0; 610 } 611 612 static int snd_uart16550_output_byte(struct snd_uart16550 *uart, 613 struct snd_rawmidi_substream *substream, 614 unsigned char midi_byte) 615 { 616 if (uart->buff_in_count == 0 /* Buffer empty? */ 617 && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && 618 uart->adaptor != SNDRV_SERIAL_GENERIC) || 619 (uart->fifo_count == 0 /* FIFO empty? */ 620 && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ 621 622 /* Tx Buffer Empty - try to write immediately */ 623 if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { 624 /* Transmitter holding register (and Tx FIFO) empty */ 625 uart->fifo_count = 1; 626 outb(midi_byte, uart->base + UART_TX); 627 } else { 628 if (uart->fifo_count < uart->fifo_limit) { 629 uart->fifo_count++; 630 outb(midi_byte, uart->base + UART_TX); 631 } else { 632 /* Cannot write (buffer empty) - 633 * put char in buffer */ 634 snd_uart16550_write_buffer(uart, midi_byte); 635 } 636 } 637 } else { 638 if (!snd_uart16550_write_buffer(uart, midi_byte)) { 639 snd_printk("%s: Buffer overrun on device at 0x%lx\n", 640 uart->rmidi->name, uart->base); 641 return 0; 642 } 643 } 644 645 return 1; 646 } 647 648 static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) 649 { 650 unsigned long flags; 651 unsigned char midi_byte, addr_byte; 652 struct snd_uart16550 *uart = substream->rmidi->private_data; 653 char first; 654 static unsigned long lasttime = 0; 655 656 /* Interrupts are disabled during the updating of the tx_buff, 657 * since it is 'bad' to have two processes updating the same 658 * variables (ie buff_in & buff_out) 659 */ 660 661 spin_lock_irqsave(&uart->open_lock, flags); 662 663 if (uart->irq < 0) /* polling */ 664 snd_uart16550_io_loop(uart); 665 666 if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { 667 while (1) { 668 /* buffer full? */ 669 /* in this mode we need two bytes of space */ 670 if (uart->buff_in_count > TX_BUFF_SIZE - 2) 671 break; 672 if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) 673 break; 674 #ifdef SNDRV_SERIAL_MS124W_MB_NOCOMBO 675 /* select exactly one of the four ports */ 676 addr_byte = (1 << (substream->number + 4)) | 0x08; 679 677 #else 680 /* select any combination of the four ports */ 681 addr_byte = (substream->number << 4) | 0x08; 682 /* ...except none */ 683 if (addr_byte == 0x08) addr_byte = 0xf8; 678 /* select any combination of the four ports */ 679 addr_byte = (substream->number << 4) | 0x08; 680 /* ...except none */ 681 if (addr_byte == 0x08) 682 addr_byte = 0xf8; 684 683 #endif 685 snd_uart16550_output_byte(uart, substream, addr_byte); 686 /* send midi byte */ 687 snd_uart16550_output_byte(uart, substream, midi_byte); 688 } 689 } else { 690 first = 0; 691 while (1) { 692 /* buffer full? */ 693 if (uart->buff_in_count >= TX_BUFF_SIZE) 694 break; 695 if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) 696 break; 697 if (first == 0 && uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS && 698 uart->prev_out != substream->number) { 699 /* Roland Soundcanvas part selection */ 700 /* If this substream of the data is different previous 701 substream in this uart, send the change part event */ 702 uart->prev_out = substream->number; 703 /* change part */ 704 snd_uart16550_output_byte(uart, substream, 0xf5); 705 /* data */ 706 snd_uart16550_output_byte(uart, substream, uart->prev_out + 1); 707 /* If midi_byte is a data byte, send the previous status byte */ 708 if (midi_byte < 0x80) 709 snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); 710 } 711 /* send midi byte */ 712 snd_uart16550_output_byte(uart, substream, midi_byte); 713 if (midi_byte >= 0x80 && midi_byte < 0xf0) 714 uart->prev_status[uart->prev_out] = midi_byte; 715 first = 1; 716 } 717 } 718 spin_unlock_irqrestore(&uart->open_lock, flags); 719 } 720 721 static void snd_uart16550_output_trigger(snd_rawmidi_substream_t * substream, int up) 722 { 723 unsigned long flags; 724 snd_uart16550_t *uart = substream->rmidi->private_data; 725 726 spin_lock_irqsave(&uart->open_lock, flags); 727 if (up) { 728 uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; 729 } else { 730 uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; 731 } 732 spin_unlock_irqrestore(&uart->open_lock, flags); 733 if (up) 734 snd_uart16550_output_write(substream); 735 } 736 737 #ifdef TARGET_OS2 738 static snd_rawmidi_ops_t snd_uart16550_output = 739 { 740 snd_uart16550_output_open, 741 snd_uart16550_output_close, 742 snd_uart16550_output_trigger,0 684 snd_uart16550_output_byte(uart, substream, addr_byte); 685 /* send midi byte */ 686 snd_uart16550_output_byte(uart, substream, midi_byte); 687 } 688 } else { 689 first = 0; 690 while (snd_rawmidi_transmit_peek(substream, &midi_byte, 1) == 1) { 691 /* Also send F5 after 3 seconds with no data 692 * to handle device disconnect */ 693 if (first == 0 && 694 (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS || 695 uart->adaptor == SNDRV_SERIAL_GENERIC) && 696 (uart->prev_out != substream->number || 697 time_after(jiffies, lasttime + 3*HZ))) { 698 699 if (snd_uart16550_buffer_can_write(uart, 3)) { 700 /* Roland Soundcanvas part selection */ 701 /* If this substream of the data is 702 * different previous substream 703 * in this uart, send the change part 704 * event 705 */ 706 uart->prev_out = substream->number; 707 /* change part */ 708 snd_uart16550_output_byte(uart, substream, 709 0xf5); 710 /* data */ 711 snd_uart16550_output_byte(uart, substream, 712 uart->prev_out + 1); 713 /* If midi_byte is a data byte, 714 * send the previous status byte */ 715 if (midi_byte < 0x80 && 716 uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS) 717 snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); 718 } else if (!uart->drop_on_full) 719 break; 720 721 } 722 723 /* send midi byte */ 724 if (!snd_uart16550_output_byte(uart, substream, midi_byte) && 725 !uart->drop_on_full ) 726 break; 727 728 if (midi_byte >= 0x80 && midi_byte < 0xf0) 729 uart->prev_status[uart->prev_out] = midi_byte; 730 first = 1; 731 732 snd_rawmidi_transmit_ack( substream, 1 ); 733 } 734 lasttime = jiffies; 735 } 736 spin_unlock_irqrestore(&uart->open_lock, flags); 737 } 738 739 static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream, 740 int up) 741 { 742 unsigned long flags; 743 struct snd_uart16550 *uart = substream->rmidi->private_data; 744 745 spin_lock_irqsave(&uart->open_lock, flags); 746 if (up) 747 uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; 748 else 749 uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; 750 spin_unlock_irqrestore(&uart->open_lock, flags); 751 if (up) 752 snd_uart16550_output_write(substream); 753 } 754 755 static struct snd_rawmidi_ops snd_uart16550_output = 756 { 757 .open = snd_uart16550_output_open, 758 .close = snd_uart16550_output_close, 759 .trigger = snd_uart16550_output_trigger, 743 760 }; 744 761 745 static s nd_rawmidi_ops_tsnd_uart16550_input =746 { 747 748 749 snd_uart16550_input_trigger,0 762 static struct snd_rawmidi_ops snd_uart16550_input = 763 { 764 .open = snd_uart16550_input_open, 765 .close = snd_uart16550_input_close, 766 .trigger = snd_uart16550_input_trigger, 750 767 }; 751 #else 752 static snd_rawmidi_ops_t snd_uart16550_output = 753 { 754 open: snd_uart16550_output_open, 755 close: snd_uart16550_output_close, 756 trigger: snd_uart16550_output_trigger, 768 769 static int snd_uart16550_free(struct snd_uart16550 *uart) 770 { 771 if (uart->irq >= 0) 772 free_irq(uart->irq, uart); 773 release_and_free_resource(uart->res_base); 774 kfree(uart); 775 return 0; 757 776 }; 758 777 759 static snd_rawmidi_ops_t snd_uart16550_input = 760 { 761 open: snd_uart16550_input_open, 762 close: snd_uart16550_input_close, 763 trigger: snd_uart16550_input_trigger, 778 static int snd_uart16550_dev_free(struct snd_device *device) 779 { 780 struct snd_uart16550 *uart = device->device_data; 781 return snd_uart16550_free(uart); 782 } 783 784 static int __devinit snd_uart16550_create(struct snd_card *card, 785 unsigned long iobase, 786 int irq, 787 unsigned int speed, 788 unsigned int base, 789 int adaptor, 790 int droponfull, 791 struct snd_uart16550 **ruart) 792 { 793 static struct snd_device_ops ops = { 794 .dev_free = snd_uart16550_dev_free, 795 }; 796 struct snd_uart16550 *uart; 797 int err; 798 799 800 if ((uart = kzalloc(sizeof(*uart), GFP_KERNEL)) == NULL) 801 return -ENOMEM; 802 uart->adaptor = adaptor; 803 uart->card = card; 804 spin_lock_init(&uart->open_lock); 805 uart->irq = -1; 806 uart->base = iobase; 807 uart->drop_on_full = droponfull; 808 809 if ((err = snd_uart16550_detect(uart)) <= 0) { 810 printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); 811 snd_uart16550_free(uart); 812 return -ENODEV; 813 } 814 815 if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { 816 if (request_irq(irq, snd_uart16550_interrupt, 817 IRQF_DISABLED, "Serial MIDI", uart)) { 818 snd_printk("irq %d busy. Using Polling.\n", irq); 819 } else { 820 uart->irq = irq; 821 } 822 } 823 uart->divisor = base / speed; 824 uart->speed = base / (unsigned int)uart->divisor; 825 uart->speed_base = base; 826 uart->prev_out = -1; 827 uart->prev_in = 0; 828 uart->rstatus = 0; 829 memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); 830 init_timer(&uart->buffer_timer); 831 uart->buffer_timer.function = snd_uart16550_buffer_timer; 832 uart->buffer_timer.data = (unsigned long)uart; 833 uart->timer_running = 0; 834 835 /* Register device */ 836 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops)) < 0) { 837 snd_uart16550_free(uart); 838 return err; 839 } 840 841 switch (uart->adaptor) { 842 case SNDRV_SERIAL_MS124W_SA: 843 case SNDRV_SERIAL_MS124W_MB: 844 /* MS-124W can draw power from RTS and DTR if they 845 are in opposite states. */ 846 outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); 847 break; 848 case SNDRV_SERIAL_MS124T: 849 /* MS-124T can draw power from RTS and/or DTR (preferably 850 both) if they are asserted. */ 851 outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); 852 break; 853 default: 854 break; 855 } 856 857 if (ruart) 858 *ruart = uart; 859 860 return 0; 861 } 862 863 static void __devinit snd_uart16550_substreams(struct snd_rawmidi_str *stream) 864 { 865 struct snd_rawmidi_substream *substream; 866 867 list_for_each_entry(substream, &stream->substreams, list) { 868 sprintf(substream->name, "Serial MIDI %d", substream->number + 1); 869 } 870 } 871 872 static int __devinit snd_uart16550_rmidi(struct snd_uart16550 *uart, int device, 873 int outs, int ins, 874 struct snd_rawmidi **rmidi) 875 { 876 struct snd_rawmidi *rrawmidi; 877 int err; 878 879 err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, 880 outs, ins, &rrawmidi); 881 if (err < 0) 882 return err; 883 snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, 884 &snd_uart16550_input); 885 snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 886 &snd_uart16550_output); 887 strcpy(rrawmidi->name, "Serial MIDI"); 888 snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); 889 snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); 890 rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 891 SNDRV_RAWMIDI_INFO_INPUT | 892 SNDRV_RAWMIDI_INFO_DUPLEX; 893 rrawmidi->private_data = uart; 894 if (rmidi) 895 *rmidi = rrawmidi; 896 return 0; 897 } 898 899 static int __devinit snd_serial_probe(struct platform_device *devptr) 900 { 901 struct snd_card *card; 902 struct snd_uart16550 *uart; 903 int err; 904 int dev = devptr->id; 905 906 switch (adaptor[dev]) { 907 case SNDRV_SERIAL_SOUNDCANVAS: 908 ins[dev] = 1; 909 break; 910 case SNDRV_SERIAL_MS124T: 911 case SNDRV_SERIAL_MS124W_SA: 912 outs[dev] = 1; 913 ins[dev] = 1; 914 break; 915 case SNDRV_SERIAL_MS124W_MB: 916 outs[dev] = 16; 917 ins[dev] = 1; 918 break; 919 case SNDRV_SERIAL_GENERIC: 920 break; 921 default: 922 snd_printk("Adaptor type is out of range 0-%d (%d)\n", 923 SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); 924 return -ENODEV; 925 } 926 927 if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { 928 snd_printk("Count of outputs is out of range 1-%d (%d)\n", 929 SNDRV_SERIAL_MAX_OUTS, outs[dev]); 930 return -ENODEV; 931 } 932 933 if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { 934 snd_printk("Count of inputs is out of range 1-%d (%d)\n", 935 SNDRV_SERIAL_MAX_INS, ins[dev]); 936 return -ENODEV; 937 } 938 939 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 940 if (card == NULL) 941 return -ENOMEM; 942 943 strcpy(card->driver, "Serial"); 944 strcpy(card->shortname, "Serial MIDI (UART16550A)"); 945 946 if ((err = snd_uart16550_create(card, 947 port[dev], 948 irq[dev], 949 speed[dev], 950 base[dev], 951 adaptor[dev], 952 droponfull[dev], 953 &uart)) < 0) 954 goto _err; 955 956 err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi); 957 if (err < 0) 958 goto _err; 959 960 sprintf(card->longname, "%s at 0x%lx, irq %d speed %d div %d outs %d ins %d adaptor %s droponfull %d", 961 card->shortname, 962 uart->base, 963 uart->irq, 964 uart->speed, 965 (int)uart->divisor, 966 outs[dev], 967 ins[dev], 968 adaptor_names[uart->adaptor], 969 uart->drop_on_full); 970 971 snd_card_set_dev(card, &devptr->dev); 972 973 if ((err = snd_card_register(card)) < 0) 974 goto _err; 975 976 platform_set_drvdata(devptr, card); 977 return 0; 978 979 _err: 980 snd_card_free(card); 981 return err; 982 } 983 984 static int __devexit snd_serial_remove(struct platform_device *devptr) 985 { 986 snd_card_free(platform_get_drvdata(devptr)); 987 platform_set_drvdata(devptr, NULL); 988 return 0; 989 } 990 991 #define SND_SERIAL_DRIVER "snd_serial_u16550" 992 993 static struct platform_driver snd_serial_driver = { 994 .probe = snd_serial_probe, 995 .remove = __devexit_p( snd_serial_remove), 996 .driver = { 997 .name = SND_SERIAL_DRIVER 998 }, 764 999 }; 1000 1001 static void snd_serial_unregister_all(void) 1002 { 1003 int i; 1004 1005 for (i = 0; i < ARRAY_SIZE(devices); ++i) 1006 platform_device_unregister(devices[i]); 1007 platform_driver_unregister(&snd_serial_driver); 1008 } 1009 1010 static int __init alsa_card_serial_init(void) 1011 { 1012 int i, cards, err; 1013 1014 if ((err = platform_driver_register(&snd_serial_driver)) < 0) 1015 return err; 1016 1017 cards = 0; 1018 for (i = 0; i < SNDRV_CARDS; i++) { 1019 struct platform_device *device; 1020 if (! enable[i]) 1021 continue; 1022 device = platform_device_register_simple(SND_SERIAL_DRIVER, 1023 i, NULL, 0); 1024 if (IS_ERR(device)) 1025 continue; 1026 if (!platform_get_drvdata(device)) { 1027 platform_device_unregister(device); 1028 continue; 1029 } 1030 devices[i] = device; 1031 cards++; 1032 } 1033 if (! cards) { 1034 #ifdef MODULE 1035 printk(KERN_ERR "serial midi soundcard not found or device busy\n"); 765 1036 #endif 766 767 static int snd_uart16550_free(snd_uart16550_t *uart) 768 { 769 if (uart->irq >= 0) 770 free_irq(uart->irq, (void *)uart); 771 if (uart->res_base) 772 release_resource(uart->res_base); 773 kfree(uart); 774 return 0; 775 }; 776 777 static int snd_uart16550_dev_free(snd_device_t *device) 778 { 779 snd_uart16550_t *uart = device->device_data; 780 return snd_uart16550_free(uart); 781 } 782 783 static int __init snd_uart16550_create(snd_card_t * card, 784 unsigned long iobase, 785 int irq, 786 unsigned int speed, 787 unsigned int base, 788 int adaptor, 789 snd_uart16550_t **ruart) 790 { 791 #ifdef TARGET_OS2 792 static snd_device_ops_t ops = { 793 snd_uart16550_dev_free,0,0,0 794 }; 795 #else 796 static snd_device_ops_t ops = { 797 dev_free: snd_uart16550_dev_free, 798 }; 799 #endif 800 snd_uart16550_t *uart; 801 int err; 802 803 804 if ((uart = kcalloc(1, sizeof(*uart), GFP_KERNEL)) == NULL) 805 return -ENOMEM; 806 uart->adaptor = adaptor; 807 uart->card = card; 808 spin_lock_init(&uart->open_lock); 809 uart->irq = -1; 810 if ((uart->res_base = request_region(iobase, 8, "Serial MIDI")) == NULL) { 811 snd_printk("unable to grab ports 0x%lx-0x%lx\n", iobase, iobase + 8 - 1); 812 return -EBUSY; 813 } 814 uart->base = iobase; 815 if (irq >= 0) { 816 if (request_irq(irq, snd_uart16550_interrupt, 817 SA_INTERRUPT, "Serial MIDI", (void *) uart)) { 818 uart->irq = -1; 819 snd_printk("irq %d busy. Using Polling.\n", irq); 820 } else { 821 uart->irq = irq; 822 } 823 } 824 uart->divisor = base / speed; 825 uart->speed = base / (unsigned int)uart->divisor; 826 uart->speed_base = base; 827 uart->prev_out = -1; 828 memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); 829 uart->buffer_timer.function = snd_uart16550_buffer_timer; 830 uart->buffer_timer.data = (unsigned long)uart; 831 uart->timer_running = 0; 832 833 /* Register device */ 834 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops)) < 0) { 835 snd_uart16550_free(uart); 836 return err; 837 } 838 839 switch (uart->adaptor) { 840 case SNDRV_SERIAL_MS124W_SA: 841 case SNDRV_SERIAL_MS124W_MB: 842 /* MS-124W can draw power from RTS and DTR if they 843 are in opposite states. */ 844 outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); 845 break; 846 case SNDRV_SERIAL_MS124T: 847 /* MS-124T can draw power from RTS and/or DTR (preferably 848 both) if they are asserted. */ 849 outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); 850 break; 851 default: 852 break; 853 } 854 855 if (ruart) 856 *ruart = uart; 857 858 return 0; 859 } 860 861 static int __init snd_uart16550_rmidi(snd_uart16550_t *uart, int device, int outs, snd_rawmidi_t **rmidi) 862 { 863 snd_rawmidi_t *rrawmidi; 864 int err; 865 866 if ((err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, outs, 1, &rrawmidi)) < 0) 867 return err; 868 snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_uart16550_input); 869 snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_uart16550_output); 870 sprintf(rrawmidi->name, "uart16550 MIDI #%d", device); 871 rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 872 SNDRV_RAWMIDI_INFO_INPUT | 873 SNDRV_RAWMIDI_INFO_DUPLEX; 874 rrawmidi->private_data = uart; 875 if (rmidi) 876 *rmidi = rrawmidi; 877 return 0; 878 } 879 880 static int __init snd_serial_probe(int dev) 881 { 882 snd_card_t *card; 883 snd_uart16550_t *uart; 884 int err; 885 886 if (!snd_enable[dev]) 887 return -ENOENT; 888 889 switch (snd_adaptor[dev]) { 890 case SNDRV_SERIAL_SOUNDCANVAS: 891 break; 892 case SNDRV_SERIAL_MS124T: 893 case SNDRV_SERIAL_MS124W_SA: 894 snd_outs[dev] = 1; 895 break; 896 case SNDRV_SERIAL_MS124W_MB: 897 snd_outs[dev] = 16; 898 break; 899 default: 900 snd_printk("Adaptor type is out of range 0-%d (%d)\n", 901 SNDRV_SERIAL_MAX_ADAPTOR, snd_adaptor[dev]); 902 return -ENODEV; 903 } 904 905 if (snd_outs[dev] < 1 || snd_outs[dev] > SNDRV_SERIAL_MAX_OUTS) { 906 snd_printk("Count of outputs is out of range 1-%d (%d)\n", 907 SNDRV_SERIAL_MAX_OUTS, snd_outs[dev]); 908 return -ENODEV; 909 } 910 911 card = snd_card_new(snd_index[dev], snd_id[dev], THIS_MODULE, 0); 912 if (card == NULL) 913 return -ENOMEM; 914 915 strcpy(card->driver, "Serial"); 916 strcpy(card->shortname, "Serial midi (uart16550A)"); 917 918 if ((err = snd_uart16550_detect(snd_port[dev])) <= 0) { 919 snd_card_free(card); 920 snd_printk("no UART detected at 0x%lx\n", (long)snd_port[dev]); 921 return err; 922 } 923 924 if ((err = snd_uart16550_create(card, 925 snd_port[dev], 926 snd_irq[dev], 927 snd_speed[dev], 928 snd_base[dev], 929 snd_adaptor[dev], 930 &uart)) < 0) { 931 snd_card_free(card); 932 return err; 933 } 934 935 if ((err = snd_uart16550_rmidi(uart, 0, snd_outs[dev], &uart->rmidi)) < 0) { 936 snd_card_free(card); 937 return err; 938 } 939 940 sprintf(card->longname, "%s at 0x%lx, irq %d speed %d div %d outs %d adaptor %s", 941 card->shortname, 942 uart->base, 943 uart->irq, 944 uart->speed, 945 (int)uart->divisor, 946 snd_outs[dev], 947 adaptor_names[uart->adaptor]); 948 949 if ((err = snd_card_register(card)) < 0) { 950 snd_card_free(card); 951 return err; 952 } 953 snd_serial_cards[dev] = card; 954 return 0; 955 } 956 957 static int __init alsa_card_serial_init(void) 958 { 959 int dev = 0; 960 int cards = 0; 961 962 for (dev = 0; dev < SNDRV_CARDS; dev++) { 963 if (snd_serial_probe(dev) == 0) 964 cards++; 965 } 966 967 if (cards == 0) { 968 #ifdef MODULE 969 snd_printk("serial midi soundcard not found or device busy\n"); 970 #endif 971 return -ENODEV; 972 } 973 return 0; 1037 snd_serial_unregister_all(); 1038 return -ENODEV; 1039 } 1040 return 0; 974 1041 } 975 1042 976 1043 static void __exit alsa_card_serial_exit(void) 977 1044 { 978 int dev; 979 980 for (dev = 0; dev < SNDRV_CARDS; dev++) { 981 if (snd_serial_cards[dev] != NULL) 982 snd_card_free(snd_serial_cards[dev]); 983 } 1045 snd_serial_unregister_all(); 984 1046 } 985 1047 986 1048 module_init(alsa_card_serial_init) 987 1049 module_exit(alsa_card_serial_exit) 988 989 #ifndef MODULE990 991 /* format is: snd-card-serial=snd_enable,snd_index,snd_id,992 snd_port,snd_irq,snd_speed,snd_base,snd_outs */993 994 static int __init alsa_card_serial_setup(char *str)995 {996 static unsigned __initdata nr_dev = 0;997 998 if (nr_dev >= SNDRV_CARDS)999 return 0;1000 (void)(get_option(&str,&snd_enable[nr_dev]) == 2 &&1001 get_option(&str,&snd_index[nr_dev]) == 2 &&1002 get_id(&str,&snd_id[nr_dev]) == 2 &&1003 get_option(&str,(int *)&snd_port[nr_dev]) == 2 &&1004 get_option(&str,&snd_irq[nr_dev]) == 2 &&1005 get_option(&str,&snd_speed[nr_dev]) == 2 &&1006 get_option(&str,&snd_base[nr_dev]) == 2 &&1007 get_option(&str,&snd_outs[nr_dev]) == 2 &&1008 get_option(&str,&snd_adaptor[nr_dev]) == 2);1009 nr_dev++;1010 return 1;1011 }1012 1013 __setup("snd-card-serial=", alsa_card_serial_setup);1014 1015 #endif /* ifndef MODULE */
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