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0017 #include <linux/delay.h>
0018 #include <linux/types.h>
0019 #include <linux/module.h>
0020 #include <linux/ioport.h>
0021 #include <linux/init.h>
0022 #include <linux/blkdev.h>
0023 #include <linux/interrupt.h>
0024 #include <linux/platform_device.h>
0025
0026 #include <asm/hwtest.h>
0027 #include <asm/io.h>
0028 #include <asm/macintosh.h>
0029 #include <asm/macints.h>
0030 #include <asm/setup.h>
0031
0032 #include <scsi/scsi_host.h>
0033
0034
0035
0036 #define NCR5380_implementation_fields int pdma_residual
0037
0038 #define NCR5380_read(reg) in_8(hostdata->io + ((reg) << 4))
0039 #define NCR5380_write(reg, value) out_8(hostdata->io + ((reg) << 4), value)
0040
0041 #define NCR5380_dma_xfer_len macscsi_dma_xfer_len
0042 #define NCR5380_dma_recv_setup macscsi_pread
0043 #define NCR5380_dma_send_setup macscsi_pwrite
0044 #define NCR5380_dma_residual macscsi_dma_residual
0045
0046 #define NCR5380_intr macscsi_intr
0047 #define NCR5380_queue_command macscsi_queue_command
0048 #define NCR5380_abort macscsi_abort
0049 #define NCR5380_host_reset macscsi_host_reset
0050 #define NCR5380_info macscsi_info
0051
0052 #include "NCR5380.h"
0053
0054 static int setup_can_queue = -1;
0055 module_param(setup_can_queue, int, 0);
0056 static int setup_cmd_per_lun = -1;
0057 module_param(setup_cmd_per_lun, int, 0);
0058 static int setup_sg_tablesize = -1;
0059 module_param(setup_sg_tablesize, int, 0);
0060 static int setup_use_pdma = 512;
0061 module_param(setup_use_pdma, int, 0);
0062 static int setup_hostid = -1;
0063 module_param(setup_hostid, int, 0);
0064 static int setup_toshiba_delay = -1;
0065 module_param(setup_toshiba_delay, int, 0);
0066
0067 #ifndef MODULE
0068 static int __init mac_scsi_setup(char *str)
0069 {
0070 int ints[8];
0071
0072 (void)get_options(str, ARRAY_SIZE(ints), ints);
0073
0074 if (ints[0] < 1) {
0075 pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n");
0076 return 0;
0077 }
0078 if (ints[0] >= 1)
0079 setup_can_queue = ints[1];
0080 if (ints[0] >= 2)
0081 setup_cmd_per_lun = ints[2];
0082 if (ints[0] >= 3)
0083 setup_sg_tablesize = ints[3];
0084 if (ints[0] >= 4)
0085 setup_hostid = ints[4];
0086
0087 if (ints[0] >= 6)
0088 setup_use_pdma = ints[6];
0089 if (ints[0] >= 7)
0090 setup_toshiba_delay = ints[7];
0091 return 1;
0092 }
0093
0094 __setup("mac5380=", mac_scsi_setup);
0095 #endif
0096
0097
0098
0099
0100
0101
0102
0103
0104
0105
0106
0107
0108
0109
0110
0111
0112 #define MOVE_BYTE(operands) \
0113 asm volatile ( \
0114 "1: moveb " operands " \n" \
0115 "11: nop \n" \
0116 " addq #1,%0 \n" \
0117 " subq #1,%1 \n" \
0118 "40: \n" \
0119 " \n" \
0120 ".section .fixup,\"ax\" \n" \
0121 ".even \n" \
0122 "90: movel #1, %2 \n" \
0123 " jra 40b \n" \
0124 ".previous \n" \
0125 " \n" \
0126 ".section __ex_table,\"a\" \n" \
0127 ".align 4 \n" \
0128 ".long 1b,90b \n" \
0129 ".long 11b,90b \n" \
0130 ".previous \n" \
0131 : "+a" (addr), "+r" (n), "+r" (result) : "a" (io))
0132
0133
0134
0135
0136
0137
0138
0139 #define MOVE_WORD(operands) \
0140 asm volatile ( \
0141 "1: movew " operands " \n" \
0142 "11: nop \n" \
0143 " subq #2,%1 \n" \
0144 "40: \n" \
0145 " \n" \
0146 ".section .fixup,\"ax\" \n" \
0147 ".even \n" \
0148 "90: movel #0, %1 \n" \
0149 " movel #2, %2 \n" \
0150 " jra 40b \n" \
0151 ".previous \n" \
0152 " \n" \
0153 ".section __ex_table,\"a\" \n" \
0154 ".align 4 \n" \
0155 ".long 1b,90b \n" \
0156 ".long 11b,90b \n" \
0157 ".previous \n" \
0158 : "+a" (addr), "+r" (n), "+r" (result) : "a" (io))
0159
0160 #define MOVE_16_WORDS(operands) \
0161 asm volatile ( \
0162 "1: movew " operands " \n" \
0163 "2: movew " operands " \n" \
0164 "3: movew " operands " \n" \
0165 "4: movew " operands " \n" \
0166 "5: movew " operands " \n" \
0167 "6: movew " operands " \n" \
0168 "7: movew " operands " \n" \
0169 "8: movew " operands " \n" \
0170 "9: movew " operands " \n" \
0171 "10: movew " operands " \n" \
0172 "11: movew " operands " \n" \
0173 "12: movew " operands " \n" \
0174 "13: movew " operands " \n" \
0175 "14: movew " operands " \n" \
0176 "15: movew " operands " \n" \
0177 "16: movew " operands " \n" \
0178 "17: nop \n" \
0179 " subl #32,%1 \n" \
0180 "40: \n" \
0181 " \n" \
0182 ".section .fixup,\"ax\" \n" \
0183 ".even \n" \
0184 "90: movel #0, %1 \n" \
0185 " movel #2, %2 \n" \
0186 " jra 40b \n" \
0187 ".previous \n" \
0188 " \n" \
0189 ".section __ex_table,\"a\" \n" \
0190 ".align 4 \n" \
0191 ".long 1b,90b \n" \
0192 ".long 2b,90b \n" \
0193 ".long 3b,90b \n" \
0194 ".long 4b,90b \n" \
0195 ".long 5b,90b \n" \
0196 ".long 6b,90b \n" \
0197 ".long 7b,90b \n" \
0198 ".long 8b,90b \n" \
0199 ".long 9b,90b \n" \
0200 ".long 10b,90b \n" \
0201 ".long 11b,90b \n" \
0202 ".long 12b,90b \n" \
0203 ".long 13b,90b \n" \
0204 ".long 14b,90b \n" \
0205 ".long 15b,90b \n" \
0206 ".long 16b,90b \n" \
0207 ".long 17b,90b \n" \
0208 ".previous \n" \
0209 : "+a" (addr), "+r" (n), "+r" (result) : "a" (io))
0210
0211 #define MAC_PDMA_DELAY 32
0212
0213 static inline int mac_pdma_recv(void __iomem *io, unsigned char *start, int n)
0214 {
0215 unsigned char *addr = start;
0216 int result = 0;
0217
0218 if (n >= 1) {
0219 MOVE_BYTE("%3@,%0@");
0220 if (result)
0221 goto out;
0222 }
0223 if (n >= 1 && ((unsigned long)addr & 1)) {
0224 MOVE_BYTE("%3@,%0@");
0225 if (result)
0226 goto out;
0227 }
0228 while (n >= 32)
0229 MOVE_16_WORDS("%3@,%0@+");
0230 while (n >= 2)
0231 MOVE_WORD("%3@,%0@+");
0232 if (result)
0233 return start - addr;
0234 if (n == 1)
0235 MOVE_BYTE("%3@,%0@");
0236 out:
0237 return addr - start;
0238 }
0239
0240 static inline int mac_pdma_send(unsigned char *start, void __iomem *io, int n)
0241 {
0242 unsigned char *addr = start;
0243 int result = 0;
0244
0245 if (n >= 1) {
0246 MOVE_BYTE("%0@,%3@");
0247 if (result)
0248 goto out;
0249 }
0250 if (n >= 1 && ((unsigned long)addr & 1)) {
0251 MOVE_BYTE("%0@,%3@");
0252 if (result)
0253 goto out;
0254 }
0255 while (n >= 32)
0256 MOVE_16_WORDS("%0@+,%3@");
0257 while (n >= 2)
0258 MOVE_WORD("%0@+,%3@");
0259 if (result)
0260 return start - addr;
0261 if (n == 1)
0262 MOVE_BYTE("%0@,%3@");
0263 out:
0264 return addr - start;
0265 }
0266
0267
0268 #define CTRL_REG 0x8
0269 #define CTRL_INTERRUPTS_ENABLE BIT(1)
0270 #define CTRL_HANDSHAKE_MODE BIT(3)
0271
0272 static inline void write_ctrl_reg(struct NCR5380_hostdata *hostdata, u32 value)
0273 {
0274 out_be32(hostdata->io + (CTRL_REG << 4), value);
0275 }
0276
0277 static inline int macscsi_pread(struct NCR5380_hostdata *hostdata,
0278 unsigned char *dst, int len)
0279 {
0280 u8 __iomem *s = hostdata->pdma_io + (INPUT_DATA_REG << 4);
0281 unsigned char *d = dst;
0282 int result = 0;
0283
0284 hostdata->pdma_residual = len;
0285
0286 while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
0287 BASR_DRQ | BASR_PHASE_MATCH,
0288 BASR_DRQ | BASR_PHASE_MATCH, 0)) {
0289 int bytes;
0290
0291 if (macintosh_config->ident == MAC_MODEL_IIFX)
0292 write_ctrl_reg(hostdata, CTRL_HANDSHAKE_MODE |
0293 CTRL_INTERRUPTS_ENABLE);
0294
0295 bytes = mac_pdma_recv(s, d, min(hostdata->pdma_residual, 512));
0296
0297 if (bytes > 0) {
0298 d += bytes;
0299 hostdata->pdma_residual -= bytes;
0300 }
0301
0302 if (hostdata->pdma_residual == 0)
0303 goto out;
0304
0305 if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
0306 BUS_AND_STATUS_REG, BASR_ACK,
0307 BASR_ACK, 0) < 0)
0308 scmd_printk(KERN_DEBUG, hostdata->connected,
0309 "%s: !REQ and !ACK\n", __func__);
0310 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
0311 goto out;
0312
0313 if (bytes == 0)
0314 udelay(MAC_PDMA_DELAY);
0315
0316 if (bytes >= 0)
0317 continue;
0318
0319 dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
0320 "%s: bus error (%d/%d)\n", __func__, d - dst, len);
0321 NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
0322 result = -1;
0323 goto out;
0324 }
0325
0326 scmd_printk(KERN_ERR, hostdata->connected,
0327 "%s: phase mismatch or !DRQ\n", __func__);
0328 NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
0329 result = -1;
0330 out:
0331 if (macintosh_config->ident == MAC_MODEL_IIFX)
0332 write_ctrl_reg(hostdata, CTRL_INTERRUPTS_ENABLE);
0333 return result;
0334 }
0335
0336 static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata,
0337 unsigned char *src, int len)
0338 {
0339 unsigned char *s = src;
0340 u8 __iomem *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4);
0341 int result = 0;
0342
0343 hostdata->pdma_residual = len;
0344
0345 while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
0346 BASR_DRQ | BASR_PHASE_MATCH,
0347 BASR_DRQ | BASR_PHASE_MATCH, 0)) {
0348 int bytes;
0349
0350 if (macintosh_config->ident == MAC_MODEL_IIFX)
0351 write_ctrl_reg(hostdata, CTRL_HANDSHAKE_MODE |
0352 CTRL_INTERRUPTS_ENABLE);
0353
0354 bytes = mac_pdma_send(s, d, min(hostdata->pdma_residual, 512));
0355
0356 if (bytes > 0) {
0357 s += bytes;
0358 hostdata->pdma_residual -= bytes;
0359 }
0360
0361 if (hostdata->pdma_residual == 0) {
0362 if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG,
0363 TCR_LAST_BYTE_SENT,
0364 TCR_LAST_BYTE_SENT,
0365 0) < 0) {
0366 scmd_printk(KERN_ERR, hostdata->connected,
0367 "%s: Last Byte Sent timeout\n", __func__);
0368 result = -1;
0369 }
0370 goto out;
0371 }
0372
0373 if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
0374 BUS_AND_STATUS_REG, BASR_ACK,
0375 BASR_ACK, 0) < 0)
0376 scmd_printk(KERN_DEBUG, hostdata->connected,
0377 "%s: !REQ and !ACK\n", __func__);
0378 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
0379 goto out;
0380
0381 if (bytes == 0)
0382 udelay(MAC_PDMA_DELAY);
0383
0384 if (bytes >= 0)
0385 continue;
0386
0387 dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
0388 "%s: bus error (%d/%d)\n", __func__, s - src, len);
0389 NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
0390 result = -1;
0391 goto out;
0392 }
0393
0394 scmd_printk(KERN_ERR, hostdata->connected,
0395 "%s: phase mismatch or !DRQ\n", __func__);
0396 NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
0397 result = -1;
0398 out:
0399 if (macintosh_config->ident == MAC_MODEL_IIFX)
0400 write_ctrl_reg(hostdata, CTRL_INTERRUPTS_ENABLE);
0401 return result;
0402 }
0403
0404 static int macscsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,
0405 struct scsi_cmnd *cmd)
0406 {
0407 int resid = NCR5380_to_ncmd(cmd)->this_residual;
0408
0409 if (hostdata->flags & FLAG_NO_PSEUDO_DMA || resid < setup_use_pdma)
0410 return 0;
0411
0412 return resid;
0413 }
0414
0415 static int macscsi_dma_residual(struct NCR5380_hostdata *hostdata)
0416 {
0417 return hostdata->pdma_residual;
0418 }
0419
0420 #include "NCR5380.c"
0421
0422 #define DRV_MODULE_NAME "mac_scsi"
0423 #define PFX DRV_MODULE_NAME ": "
0424
0425 static struct scsi_host_template mac_scsi_template = {
0426 .module = THIS_MODULE,
0427 .proc_name = DRV_MODULE_NAME,
0428 .name = "Macintosh NCR5380 SCSI",
0429 .info = macscsi_info,
0430 .queuecommand = macscsi_queue_command,
0431 .eh_abort_handler = macscsi_abort,
0432 .eh_host_reset_handler = macscsi_host_reset,
0433 .can_queue = 16,
0434 .this_id = 7,
0435 .sg_tablesize = 1,
0436 .cmd_per_lun = 2,
0437 .dma_boundary = PAGE_SIZE - 1,
0438 .cmd_size = sizeof(struct NCR5380_cmd),
0439 .max_sectors = 128,
0440 };
0441
0442 static int __init mac_scsi_probe(struct platform_device *pdev)
0443 {
0444 struct Scsi_Host *instance;
0445 struct NCR5380_hostdata *hostdata;
0446 int error;
0447 int host_flags = 0;
0448 struct resource *irq, *pio_mem, *pdma_mem = NULL;
0449
0450 pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
0451 if (!pio_mem)
0452 return -ENODEV;
0453
0454 pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
0455
0456 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
0457
0458 if (!hwreg_present((unsigned char *)pio_mem->start +
0459 (STATUS_REG << 4))) {
0460 pr_info(PFX "no device detected at %pap\n", &pio_mem->start);
0461 return -ENODEV;
0462 }
0463
0464 if (setup_can_queue > 0)
0465 mac_scsi_template.can_queue = setup_can_queue;
0466 if (setup_cmd_per_lun > 0)
0467 mac_scsi_template.cmd_per_lun = setup_cmd_per_lun;
0468 if (setup_sg_tablesize > 0)
0469 mac_scsi_template.sg_tablesize = setup_sg_tablesize;
0470 if (setup_hostid >= 0)
0471 mac_scsi_template.this_id = setup_hostid & 7;
0472
0473 instance = scsi_host_alloc(&mac_scsi_template,
0474 sizeof(struct NCR5380_hostdata));
0475 if (!instance)
0476 return -ENOMEM;
0477
0478 if (irq)
0479 instance->irq = irq->start;
0480 else
0481 instance->irq = NO_IRQ;
0482
0483 hostdata = shost_priv(instance);
0484 hostdata->base = pio_mem->start;
0485 hostdata->io = (u8 __iomem *)pio_mem->start;
0486
0487 if (pdma_mem && setup_use_pdma)
0488 hostdata->pdma_io = (u8 __iomem *)pdma_mem->start;
0489 else
0490 host_flags |= FLAG_NO_PSEUDO_DMA;
0491
0492 host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
0493
0494 error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP);
0495 if (error)
0496 goto fail_init;
0497
0498 if (instance->irq != NO_IRQ) {
0499 error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
0500 "NCR5380", instance);
0501 if (error)
0502 goto fail_irq;
0503 }
0504
0505 NCR5380_maybe_reset_bus(instance);
0506
0507 error = scsi_add_host(instance, NULL);
0508 if (error)
0509 goto fail_host;
0510
0511 platform_set_drvdata(pdev, instance);
0512
0513 scsi_scan_host(instance);
0514 return 0;
0515
0516 fail_host:
0517 if (instance->irq != NO_IRQ)
0518 free_irq(instance->irq, instance);
0519 fail_irq:
0520 NCR5380_exit(instance);
0521 fail_init:
0522 scsi_host_put(instance);
0523 return error;
0524 }
0525
0526 static int __exit mac_scsi_remove(struct platform_device *pdev)
0527 {
0528 struct Scsi_Host *instance = platform_get_drvdata(pdev);
0529
0530 scsi_remove_host(instance);
0531 if (instance->irq != NO_IRQ)
0532 free_irq(instance->irq, instance);
0533 NCR5380_exit(instance);
0534 scsi_host_put(instance);
0535 return 0;
0536 }
0537
0538 static struct platform_driver mac_scsi_driver = {
0539 .remove = __exit_p(mac_scsi_remove),
0540 .driver = {
0541 .name = DRV_MODULE_NAME,
0542 },
0543 };
0544
0545 module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe);
0546
0547 MODULE_ALIAS("platform:" DRV_MODULE_NAME);
0548 MODULE_LICENSE("GPL");
