aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mmc/wbsd.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/wbsd.c')
-rw-r--r--drivers/mmc/wbsd.c716
1 files changed, 531 insertions, 185 deletions
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index 39747526c719..b7fbd30b49a0 100644
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -28,7 +28,9 @@
28#include <linux/ioport.h> 28#include <linux/ioport.h>
29#include <linux/device.h> 29#include <linux/device.h>
30#include <linux/interrupt.h> 30#include <linux/interrupt.h>
31#include <linux/dma-mapping.h>
31#include <linux/delay.h> 32#include <linux/delay.h>
33#include <linux/pnp.h>
32#include <linux/highmem.h> 34#include <linux/highmem.h>
33#include <linux/mmc/host.h> 35#include <linux/mmc/host.h>
34#include <linux/mmc/protocol.h> 36#include <linux/mmc/protocol.h>
@@ -40,7 +42,7 @@
40#include "wbsd.h" 42#include "wbsd.h"
41 43
42#define DRIVER_NAME "wbsd" 44#define DRIVER_NAME "wbsd"
43#define DRIVER_VERSION "1.1" 45#define DRIVER_VERSION "1.2"
44 46
45#ifdef CONFIG_MMC_DEBUG 47#ifdef CONFIG_MMC_DEBUG
46#define DBG(x...) \ 48#define DBG(x...) \
@@ -52,10 +54,6 @@
52#define DBGF(x...) do { } while (0) 54#define DBGF(x...) do { } while (0)
53#endif 55#endif
54 56
55static unsigned int io = 0x248;
56static unsigned int irq = 6;
57static int dma = 2;
58
59#ifdef CONFIG_MMC_DEBUG 57#ifdef CONFIG_MMC_DEBUG
60void DBG_REG(int reg, u8 value) 58void DBG_REG(int reg, u8 value)
61{ 59{
@@ -79,28 +77,61 @@ void DBG_REG(int reg, u8 value)
79#endif 77#endif
80 78
81/* 79/*
80 * Device resources
81 */
82
83#ifdef CONFIG_PNP
84
85static const struct pnp_device_id pnp_dev_table[] = {
86 { "WEC0517", 0 },
87 { "WEC0518", 0 },
88 { "", 0 },
89};
90
91MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
92
93#endif /* CONFIG_PNP */
94
95#ifdef CONFIG_PNP
96static unsigned int nopnp = 0;
97#else
98static const unsigned int nopnp = 1;
99#endif
100static unsigned int io = 0x248;
101static unsigned int irq = 6;
102static int dma = 2;
103
104/*
82 * Basic functions 105 * Basic functions
83 */ 106 */
84 107
85static inline void wbsd_unlock_config(struct wbsd_host* host) 108static inline void wbsd_unlock_config(struct wbsd_host* host)
86{ 109{
110 BUG_ON(host->config == 0);
111
87 outb(host->unlock_code, host->config); 112 outb(host->unlock_code, host->config);
88 outb(host->unlock_code, host->config); 113 outb(host->unlock_code, host->config);
89} 114}
90 115
91static inline void wbsd_lock_config(struct wbsd_host* host) 116static inline void wbsd_lock_config(struct wbsd_host* host)
92{ 117{
118 BUG_ON(host->config == 0);
119
93 outb(LOCK_CODE, host->config); 120 outb(LOCK_CODE, host->config);
94} 121}
95 122
96static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) 123static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value)
97{ 124{
125 BUG_ON(host->config == 0);
126
98 outb(reg, host->config); 127 outb(reg, host->config);
99 outb(value, host->config + 1); 128 outb(value, host->config + 1);
100} 129}
101 130
102static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg) 131static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg)
103{ 132{
133 BUG_ON(host->config == 0);
134
104 outb(reg, host->config); 135 outb(reg, host->config);
105 return inb(host->config + 1); 136 return inb(host->config + 1);
106} 137}
@@ -133,6 +164,13 @@ static void wbsd_init_device(struct wbsd_host* host)
133 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 164 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
134 165
135 /* 166 /*
167 * Set DAT3 to input
168 */
169 setup &= ~WBSD_DAT3_H;
170 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
171 host->flags &= ~WBSD_FIGNORE_DETECT;
172
173 /*
136 * Read back default clock. 174 * Read back default clock.
137 */ 175 */
138 host->clk = wbsd_read_index(host, WBSD_IDX_CLK); 176 host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
@@ -148,6 +186,14 @@ static void wbsd_init_device(struct wbsd_host* host)
148 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); 186 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
149 187
150 /* 188 /*
189 * Test for card presence
190 */
191 if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)
192 host->flags |= WBSD_FCARD_PRESENT;
193 else
194 host->flags &= ~WBSD_FCARD_PRESENT;
195
196 /*
151 * Enable interesting interrupts. 197 * Enable interesting interrupts.
152 */ 198 */
153 ier = 0; 199 ier = 0;
@@ -407,8 +453,6 @@ static inline void wbsd_get_long_reply(struct wbsd_host* host,
407 } 453 }
408} 454}
409 455
410static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs);
411
412static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) 456static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd)
413{ 457{
414 int i; 458 int i;
@@ -646,6 +690,13 @@ static void wbsd_fill_fifo(struct wbsd_host* host)
646 } 690 }
647 691
648 wbsd_kunmap_sg(host); 692 wbsd_kunmap_sg(host);
693
694 /*
695 * The controller stops sending interrupts for
696 * 'FIFO empty' under certain conditions. So we
697 * need to be a bit more pro-active.
698 */
699 tasklet_schedule(&host->fifo_tasklet);
649} 700}
650 701
651static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) 702static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data)
@@ -850,9 +901,11 @@ static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data)
850 wbsd_request_end(host, host->mrq); 901 wbsd_request_end(host, host->mrq);
851} 902}
852 903
853/* 904/*****************************************************************************\
854 * MMC Callbacks 905 * *
855 */ 906 * MMC layer callbacks *
907 * *
908\*****************************************************************************/
856 909
857static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) 910static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq)
858{ 911{
@@ -874,7 +927,7 @@ static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq)
874 * If there is no card in the slot then 927 * If there is no card in the slot then
875 * timeout immediatly. 928 * timeout immediatly.
876 */ 929 */
877 if (!(inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)) 930 if (!(host->flags & WBSD_FCARD_PRESENT))
878 { 931 {
879 cmd->error = MMC_ERR_TIMEOUT; 932 cmd->error = MMC_ERR_TIMEOUT;
880 goto done; 933 goto done;
@@ -953,33 +1006,50 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
953 host->clk = clk; 1006 host->clk = clk;
954 } 1007 }
955 1008
1009 /*
1010 * Power up card.
1011 */
956 if (ios->power_mode != MMC_POWER_OFF) 1012 if (ios->power_mode != MMC_POWER_OFF)
957 { 1013 {
958 /*
959 * Power up card.
960 */
961 pwr = inb(host->base + WBSD_CSR); 1014 pwr = inb(host->base + WBSD_CSR);
962 pwr &= ~WBSD_POWER_N; 1015 pwr &= ~WBSD_POWER_N;
963 outb(pwr, host->base + WBSD_CSR); 1016 outb(pwr, host->base + WBSD_CSR);
964
965 /*
966 * This behaviour is stolen from the
967 * Windows driver. Don't know why, but
968 * it is needed.
969 */
970 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
971 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
972 setup |= WBSD_DAT3_H;
973 else
974 setup &= ~WBSD_DAT3_H;
975 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
976
977 mdelay(1);
978 } 1017 }
979 1018
1019 /*
1020 * MMC cards need to have pin 1 high during init.
1021 * Init time corresponds rather nicely with the bus mode.
1022 * It wreaks havoc with the card detection though so
1023 * that needs to be disabed.
1024 */
1025 setup = wbsd_read_index(host, WBSD_IDX_SETUP);
1026 if ((ios->power_mode == MMC_POWER_ON) &&
1027 (ios->bus_mode == MMC_BUSMODE_OPENDRAIN))
1028 {
1029 setup |= WBSD_DAT3_H;
1030 host->flags |= WBSD_FIGNORE_DETECT;
1031 }
1032 else
1033 {
1034 setup &= ~WBSD_DAT3_H;
1035 host->flags &= ~WBSD_FIGNORE_DETECT;
1036 }
1037 wbsd_write_index(host, WBSD_IDX_SETUP, setup);
1038
980 spin_unlock_bh(&host->lock); 1039 spin_unlock_bh(&host->lock);
981} 1040}
982 1041
1042static struct mmc_host_ops wbsd_ops = {
1043 .request = wbsd_request,
1044 .set_ios = wbsd_set_ios,
1045};
1046
1047/*****************************************************************************\
1048 * *
1049 * Interrupt handling *
1050 * *
1051\*****************************************************************************/
1052
983/* 1053/*
984 * Tasklets 1054 * Tasklets
985 */ 1055 */
@@ -1005,17 +1075,33 @@ static void wbsd_tasklet_card(unsigned long param)
1005{ 1075{
1006 struct wbsd_host* host = (struct wbsd_host*)param; 1076 struct wbsd_host* host = (struct wbsd_host*)param;
1007 u8 csr; 1077 u8 csr;
1078 int change = 0;
1008 1079
1009 spin_lock(&host->lock); 1080 spin_lock(&host->lock);
1010 1081
1082 if (host->flags & WBSD_FIGNORE_DETECT)
1083 {
1084 spin_unlock(&host->lock);
1085 return;
1086 }
1087
1011 csr = inb(host->base + WBSD_CSR); 1088 csr = inb(host->base + WBSD_CSR);
1012 WARN_ON(csr == 0xff); 1089 WARN_ON(csr == 0xff);
1013 1090
1014 if (csr & WBSD_CARDPRESENT) 1091 if (csr & WBSD_CARDPRESENT)
1015 DBG("Card inserted\n"); 1092 {
1016 else 1093 if (!(host->flags & WBSD_FCARD_PRESENT))
1094 {
1095 DBG("Card inserted\n");
1096 host->flags |= WBSD_FCARD_PRESENT;
1097 change = 1;
1098 }
1099 }
1100 else if (host->flags & WBSD_FCARD_PRESENT)
1017 { 1101 {
1018 DBG("Card removed\n"); 1102 DBG("Card removed\n");
1103 host->flags &= ~WBSD_FCARD_PRESENT;
1104 change = 1;
1019 1105
1020 if (host->mrq) 1106 if (host->mrq)
1021 { 1107 {
@@ -1033,7 +1119,8 @@ static void wbsd_tasklet_card(unsigned long param)
1033 */ 1119 */
1034 spin_unlock(&host->lock); 1120 spin_unlock(&host->lock);
1035 1121
1036 mmc_detect_change(host->mmc); 1122 if (change)
1123 mmc_detect_change(host->mmc);
1037} 1124}
1038 1125
1039static void wbsd_tasklet_fifo(unsigned long param) 1126static void wbsd_tasklet_fifo(unsigned long param)
@@ -1200,11 +1287,85 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs)
1200 return IRQ_HANDLED; 1287 return IRQ_HANDLED;
1201} 1288}
1202 1289
1290/*****************************************************************************\
1291 * *
1292 * Device initialisation and shutdown *
1293 * *
1294\*****************************************************************************/
1295
1203/* 1296/*
1204 * Support functions for probe 1297 * Allocate/free MMC structure.
1205 */ 1298 */
1206 1299
1207static int wbsd_scan(struct wbsd_host* host) 1300static int __devinit wbsd_alloc_mmc(struct device* dev)
1301{
1302 struct mmc_host* mmc;
1303 struct wbsd_host* host;
1304
1305 /*
1306 * Allocate MMC structure.
1307 */
1308 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
1309 if (!mmc)
1310 return -ENOMEM;
1311
1312 host = mmc_priv(mmc);
1313 host->mmc = mmc;
1314
1315 host->dma = -1;
1316
1317 /*
1318 * Set host parameters.
1319 */
1320 mmc->ops = &wbsd_ops;
1321 mmc->f_min = 375000;
1322 mmc->f_max = 24000000;
1323 mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
1324
1325 spin_lock_init(&host->lock);
1326
1327 /*
1328 * Maximum number of segments. Worst case is one sector per segment
1329 * so this will be 64kB/512.
1330 */
1331 mmc->max_hw_segs = 128;
1332 mmc->max_phys_segs = 128;
1333
1334 /*
1335 * Maximum number of sectors in one transfer. Also limited by 64kB
1336 * buffer.
1337 */
1338 mmc->max_sectors = 128;
1339
1340 /*
1341 * Maximum segment size. Could be one segment with the maximum number
1342 * of segments.
1343 */
1344 mmc->max_seg_size = mmc->max_sectors * 512;
1345
1346 dev_set_drvdata(dev, mmc);
1347
1348 return 0;
1349}
1350
1351static void __devexit wbsd_free_mmc(struct device* dev)
1352{
1353 struct mmc_host* mmc;
1354
1355 mmc = dev_get_drvdata(dev);
1356 if (!mmc)
1357 return;
1358
1359 mmc_free_host(mmc);
1360
1361 dev_set_drvdata(dev, NULL);
1362}
1363
1364/*
1365 * Scan for known chip id:s
1366 */
1367
1368static int __devinit wbsd_scan(struct wbsd_host* host)
1208{ 1369{
1209 int i, j, k; 1370 int i, j, k;
1210 int id; 1371 int id;
@@ -1258,12 +1419,16 @@ static int wbsd_scan(struct wbsd_host* host)
1258 return -ENODEV; 1419 return -ENODEV;
1259} 1420}
1260 1421
1261static int wbsd_request_regions(struct wbsd_host* host) 1422/*
1423 * Allocate/free io port ranges
1424 */
1425
1426static int __devinit wbsd_request_region(struct wbsd_host* host, int base)
1262{ 1427{
1263 if (io & 0x7) 1428 if (io & 0x7)
1264 return -EINVAL; 1429 return -EINVAL;
1265 1430
1266 if (!request_region(io, 8, DRIVER_NAME)) 1431 if (!request_region(base, 8, DRIVER_NAME))
1267 return -EIO; 1432 return -EIO;
1268 1433
1269 host->base = io; 1434 host->base = io;
@@ -1271,19 +1436,25 @@ static int wbsd_request_regions(struct wbsd_host* host)
1271 return 0; 1436 return 0;
1272} 1437}
1273 1438
1274static void wbsd_release_regions(struct wbsd_host* host) 1439static void __devexit wbsd_release_regions(struct wbsd_host* host)
1275{ 1440{
1276 if (host->base) 1441 if (host->base)
1277 release_region(host->base, 8); 1442 release_region(host->base, 8);
1443
1444 host->base = 0;
1278 1445
1279 if (host->config) 1446 if (host->config)
1280 release_region(host->config, 2); 1447 release_region(host->config, 2);
1448
1449 host->config = 0;
1281} 1450}
1282 1451
1283static void wbsd_init_dma(struct wbsd_host* host) 1452/*
1453 * Allocate/free DMA port and buffer
1454 */
1455
1456static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma)
1284{ 1457{
1285 host->dma = -1;
1286
1287 if (dma < 0) 1458 if (dma < 0)
1288 return; 1459 return;
1289 1460
@@ -1294,7 +1465,7 @@ static void wbsd_init_dma(struct wbsd_host* host)
1294 * We need to allocate a special buffer in 1465 * We need to allocate a special buffer in
1295 * order for ISA to be able to DMA to it. 1466 * order for ISA to be able to DMA to it.
1296 */ 1467 */
1297 host->dma_buffer = kmalloc(65536, 1468 host->dma_buffer = kmalloc(WBSD_DMA_SIZE,
1298 GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN); 1469 GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN);
1299 if (!host->dma_buffer) 1470 if (!host->dma_buffer)
1300 goto free; 1471 goto free;
@@ -1302,7 +1473,8 @@ static void wbsd_init_dma(struct wbsd_host* host)
1302 /* 1473 /*
1303 * Translate the address to a physical address. 1474 * Translate the address to a physical address.
1304 */ 1475 */
1305 host->dma_addr = isa_virt_to_bus(host->dma_buffer); 1476 host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer,
1477 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
1306 1478
1307 /* 1479 /*
1308 * ISA DMA must be aligned on a 64k basis. 1480 * ISA DMA must be aligned on a 64k basis.
@@ -1325,6 +1497,10 @@ kfree:
1325 */ 1497 */
1326 BUG_ON(1); 1498 BUG_ON(1);
1327 1499
1500 dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE,
1501 DMA_BIDIRECTIONAL);
1502 host->dma_addr = (dma_addr_t)NULL;
1503
1328 kfree(host->dma_buffer); 1504 kfree(host->dma_buffer);
1329 host->dma_buffer = NULL; 1505 host->dma_buffer = NULL;
1330 1506
@@ -1336,60 +1512,122 @@ err:
1336 "Falling back on FIFO.\n", dma); 1512 "Falling back on FIFO.\n", dma);
1337} 1513}
1338 1514
1339static struct mmc_host_ops wbsd_ops = { 1515static void __devexit wbsd_release_dma(struct wbsd_host* host)
1340 .request = wbsd_request, 1516{
1341 .set_ios = wbsd_set_ios, 1517 if (host->dma_addr)
1342}; 1518 dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE,
1519 DMA_BIDIRECTIONAL);
1520 if (host->dma_buffer)
1521 kfree(host->dma_buffer);
1522 if (host->dma >= 0)
1523 free_dma(host->dma);
1524
1525 host->dma = -1;
1526 host->dma_buffer = NULL;
1527 host->dma_addr = (dma_addr_t)NULL;
1528}
1343 1529
1344/* 1530/*
1345 * Device probe 1531 * Allocate/free IRQ.
1346 */ 1532 */
1347 1533
1348static int wbsd_probe(struct device* dev) 1534static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq)
1349{ 1535{
1350 struct wbsd_host* host = NULL;
1351 struct mmc_host* mmc = NULL;
1352 int ret; 1536 int ret;
1353 1537
1354 /* 1538 /*
1355 * Allocate MMC structure. 1539 * Allocate interrupt.
1356 */ 1540 */
1357 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); 1541
1358 if (!mmc) 1542 ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host);
1359 return -ENOMEM; 1543 if (ret)
1360 1544 return ret;
1361 host = mmc_priv(mmc);
1362 host->mmc = mmc;
1363 1545
1546 host->irq = irq;
1547
1364 /* 1548 /*
1365 * Scan for hardware. 1549 * Set up tasklets.
1366 */ 1550 */
1367 ret = wbsd_scan(host); 1551 tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host);
1368 if (ret) 1552 tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host);
1369 goto freemmc; 1553 tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host);
1554 tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host);
1555 tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host);
1556 tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host);
1557
1558 return 0;
1559}
1370 1560
1371 /* 1561static void __devexit wbsd_release_irq(struct wbsd_host* host)
1372 * Reset the chip. 1562{
1373 */ 1563 if (!host->irq)
1374 wbsd_write_config(host, WBSD_CONF_SWRST, 1); 1564 return;
1375 wbsd_write_config(host, WBSD_CONF_SWRST, 0);
1376 1565
1566 free_irq(host->irq, host);
1567
1568 host->irq = 0;
1569
1570 tasklet_kill(&host->card_tasklet);
1571 tasklet_kill(&host->fifo_tasklet);
1572 tasklet_kill(&host->crc_tasklet);
1573 tasklet_kill(&host->timeout_tasklet);
1574 tasklet_kill(&host->finish_tasklet);
1575 tasklet_kill(&host->block_tasklet);
1576}
1577
1578/*
1579 * Allocate all resources for the host.
1580 */
1581
1582static int __devinit wbsd_request_resources(struct wbsd_host* host,
1583 int base, int irq, int dma)
1584{
1585 int ret;
1586
1377 /* 1587 /*
1378 * Allocate I/O ports. 1588 * Allocate I/O ports.
1379 */ 1589 */
1380 ret = wbsd_request_regions(host); 1590 ret = wbsd_request_region(host, base);
1381 if (ret) 1591 if (ret)
1382 goto release; 1592 return ret;
1383 1593
1384 /* 1594 /*
1385 * Set host parameters. 1595 * Allocate interrupt.
1386 */ 1596 */
1387 mmc->ops = &wbsd_ops; 1597 ret = wbsd_request_irq(host, irq);
1388 mmc->f_min = 375000; 1598 if (ret)
1389 mmc->f_max = 24000000; 1599 return ret;
1390 mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; 1600
1601 /*
1602 * Allocate DMA.
1603 */
1604 wbsd_request_dma(host, dma);
1391 1605
1392 spin_lock_init(&host->lock); 1606 return 0;
1607}
1608
1609/*
1610 * Release all resources for the host.
1611 */
1612
1613static void __devexit wbsd_release_resources(struct wbsd_host* host)
1614{
1615 wbsd_release_dma(host);
1616 wbsd_release_irq(host);
1617 wbsd_release_regions(host);
1618}
1619
1620/*
1621 * Configure the resources the chip should use.
1622 */
1623
1624static void __devinit wbsd_chip_config(struct wbsd_host* host)
1625{
1626 /*
1627 * Reset the chip.
1628 */
1629 wbsd_write_config(host, WBSD_CONF_SWRST, 1);
1630 wbsd_write_config(host, WBSD_CONF_SWRST, 0);
1393 1631
1394 /* 1632 /*
1395 * Select SD/MMC function. 1633 * Select SD/MMC function.
@@ -1399,165 +1637,241 @@ static int wbsd_probe(struct device* dev)
1399 /* 1637 /*
1400 * Set up card detection. 1638 * Set up card detection.
1401 */ 1639 */
1402 wbsd_write_config(host, WBSD_CONF_PINS, 0x02); 1640 wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11);
1403 1641
1404 /* 1642 /*
1405 * Configure I/O port. 1643 * Configure chip
1406 */ 1644 */
1407 wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); 1645 wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8);
1408 wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); 1646 wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff);
1409
1410 /*
1411 * Allocate interrupt.
1412 */
1413 ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host);
1414 if (ret)
1415 goto release;
1416 1647
1417 host->irq = irq; 1648 wbsd_write_config(host, WBSD_CONF_IRQ, host->irq);
1418 1649
1419 /* 1650 if (host->dma >= 0)
1420 * Set up tasklets. 1651 wbsd_write_config(host, WBSD_CONF_DRQ, host->dma);
1421 */
1422 tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host);
1423 tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host);
1424 tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host);
1425 tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host);
1426 tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host);
1427 tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host);
1428 1652
1429 /* 1653 /*
1430 * Configure interrupt. 1654 * Enable and power up chip.
1431 */ 1655 */
1432 wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); 1656 wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
1657 wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
1658}
1659
1660/*
1661 * Check that configured resources are correct.
1662 */
1663
1664static int __devinit wbsd_chip_validate(struct wbsd_host* host)
1665{
1666 int base, irq, dma;
1433 1667
1434 /* 1668 /*
1435 * Allocate DMA. 1669 * Select SD/MMC function.
1436 */ 1670 */
1437 wbsd_init_dma(host); 1671 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1438 1672
1439 /* 1673 /*
1440 * If all went well, then configure DMA. 1674 * Read configuration.
1441 */ 1675 */
1442 if (host->dma >= 0) 1676 base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8;
1443 wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); 1677 base |= wbsd_read_config(host, WBSD_CONF_PORT_LO);
1444 1678
1445 /* 1679 irq = wbsd_read_config(host, WBSD_CONF_IRQ);
1446 * Maximum number of segments. Worst case is one sector per segment 1680
1447 * so this will be 64kB/512. 1681 dma = wbsd_read_config(host, WBSD_CONF_DRQ);
1448 */
1449 mmc->max_hw_segs = 128;
1450 mmc->max_phys_segs = 128;
1451 1682
1452 /* 1683 /*
1453 * Maximum number of sectors in one transfer. Also limited by 64kB 1684 * Validate against given configuration.
1454 * buffer.
1455 */ 1685 */
1456 mmc->max_sectors = 128; 1686 if (base != host->base)
1687 return 0;
1688 if (irq != host->irq)
1689 return 0;
1690 if ((dma != host->dma) && (host->dma != -1))
1691 return 0;
1692
1693 return 1;
1694}
1695
1696/*****************************************************************************\
1697 * *
1698 * Devices setup and shutdown *
1699 * *
1700\*****************************************************************************/
1701
1702static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma,
1703 int pnp)
1704{
1705 struct wbsd_host* host = NULL;
1706 struct mmc_host* mmc = NULL;
1707 int ret;
1708
1709 ret = wbsd_alloc_mmc(dev);
1710 if (ret)
1711 return ret;
1712
1713 mmc = dev_get_drvdata(dev);
1714 host = mmc_priv(mmc);
1457 1715
1458 /* 1716 /*
1459 * Maximum segment size. Could be one segment with the maximum number 1717 * Scan for hardware.
1460 * of segments.
1461 */ 1718 */
1462 mmc->max_seg_size = mmc->max_sectors * 512; 1719 ret = wbsd_scan(host);
1720 if (ret)
1721 {
1722 if (pnp && (ret == -ENODEV))
1723 {
1724 printk(KERN_WARNING DRIVER_NAME
1725 ": Unable to confirm device presence. You may "
1726 "experience lock-ups.\n");
1727 }
1728 else
1729 {
1730 wbsd_free_mmc(dev);
1731 return ret;
1732 }
1733 }
1463 1734
1464 /* 1735 /*
1465 * Enable chip. 1736 * Request resources.
1466 */ 1737 */
1467 wbsd_write_config(host, WBSD_CONF_ENABLE, 1); 1738 ret = wbsd_request_resources(host, io, irq, dma);
1739 if (ret)
1740 {
1741 wbsd_release_resources(host);
1742 wbsd_free_mmc(dev);
1743 return ret;
1744 }
1468 1745
1469 /* 1746 /*
1470 * Power up chip. 1747 * See if chip needs to be configured.
1471 */ 1748 */
1472 wbsd_write_config(host, WBSD_CONF_POWER, 0x20); 1749 if (pnp && (host->config != 0))
1750 {
1751 if (!wbsd_chip_validate(host))
1752 {
1753 printk(KERN_WARNING DRIVER_NAME
1754 ": PnP active but chip not configured! "
1755 "You probably have a buggy BIOS. "
1756 "Configuring chip manually.\n");
1757 wbsd_chip_config(host);
1758 }
1759 }
1760 else
1761 wbsd_chip_config(host);
1473 1762
1474 /* 1763 /*
1475 * Power Management stuff. No idea how this works. 1764 * Power Management stuff. No idea how this works.
1476 * Not tested. 1765 * Not tested.
1477 */ 1766 */
1478#ifdef CONFIG_PM 1767#ifdef CONFIG_PM
1479 wbsd_write_config(host, WBSD_CONF_PME, 0xA0); 1768 if (host->config)
1769 wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
1480#endif 1770#endif
1771 /*
1772 * Allow device to initialise itself properly.
1773 */
1774 mdelay(5);
1481 1775
1482 /* 1776 /*
1483 * Reset the chip into a known state. 1777 * Reset the chip into a known state.
1484 */ 1778 */
1485 wbsd_init_device(host); 1779 wbsd_init_device(host);
1486 1780
1487 dev_set_drvdata(dev, mmc);
1488
1489 /*
1490 * Add host to MMC layer.
1491 */
1492 mmc_add_host(mmc); 1781 mmc_add_host(mmc);
1493 1782
1494 printk(KERN_INFO "%s: W83L51xD id %x at 0x%x irq %d dma %d\n", 1783 printk(KERN_INFO "%s: W83L51xD", mmc->host_name);
1495 mmc->host_name, (int)host->chip_id, (int)host->base, 1784 if (host->chip_id != 0)
1496 (int)host->irq, (int)host->dma); 1785 printk(" id %x", (int)host->chip_id);
1786 printk(" at 0x%x irq %d", (int)host->base, (int)host->irq);
1787 if (host->dma >= 0)
1788 printk(" dma %d", (int)host->dma);
1789 else
1790 printk(" FIFO");
1791 if (pnp)
1792 printk(" PnP");
1793 printk("\n");
1497 1794
1498 return 0; 1795 return 0;
1499
1500release:
1501 wbsd_release_regions(host);
1502
1503freemmc:
1504 mmc_free_host(mmc);
1505
1506 return ret;
1507} 1796}
1508 1797
1509/* 1798static void __devexit wbsd_shutdown(struct device* dev, int pnp)
1510 * Device remove
1511 */
1512
1513static int wbsd_remove(struct device* dev)
1514{ 1799{
1515 struct mmc_host* mmc = dev_get_drvdata(dev); 1800 struct mmc_host* mmc = dev_get_drvdata(dev);
1516 struct wbsd_host* host; 1801 struct wbsd_host* host;
1517 1802
1518 if (!mmc) 1803 if (!mmc)
1519 return 0; 1804 return;
1520 1805
1521 host = mmc_priv(mmc); 1806 host = mmc_priv(mmc);
1522 1807
1523 /*
1524 * Unregister host with MMC layer.
1525 */
1526 mmc_remove_host(mmc); 1808 mmc_remove_host(mmc);
1527 1809
1528 /* 1810 if (!pnp)
1529 * Power down the SD/MMC function. 1811 {
1530 */ 1812 /*
1531 wbsd_unlock_config(host); 1813 * Power down the SD/MMC function.
1532 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); 1814 */
1533 wbsd_write_config(host, WBSD_CONF_ENABLE, 0); 1815 wbsd_unlock_config(host);
1534 wbsd_lock_config(host); 1816 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
1817 wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
1818 wbsd_lock_config(host);
1819 }
1535 1820
1536 /* 1821 wbsd_release_resources(host);
1537 * Free resources.
1538 */
1539 if (host->dma_buffer)
1540 kfree(host->dma_buffer);
1541 1822
1542 if (host->dma >= 0) 1823 wbsd_free_mmc(dev);
1543 free_dma(host->dma); 1824}
1544 1825
1545 free_irq(host->irq, host); 1826/*
1827 * Non-PnP
1828 */
1829
1830static int __devinit wbsd_probe(struct device* dev)
1831{
1832 return wbsd_init(dev, io, irq, dma, 0);
1833}
1834
1835static int __devexit wbsd_remove(struct device* dev)
1836{
1837 wbsd_shutdown(dev, 0);
1838
1839 return 0;
1840}
1841
1842/*
1843 * PnP
1844 */
1845
1846#ifdef CONFIG_PNP
1847
1848static int __devinit
1849wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id)
1850{
1851 int io, irq, dma;
1546 1852
1547 tasklet_kill(&host->card_tasklet); 1853 /*
1548 tasklet_kill(&host->fifo_tasklet); 1854 * Get resources from PnP layer.
1549 tasklet_kill(&host->crc_tasklet); 1855 */
1550 tasklet_kill(&host->timeout_tasklet); 1856 io = pnp_port_start(pnpdev, 0);
1551 tasklet_kill(&host->finish_tasklet); 1857 irq = pnp_irq(pnpdev, 0);
1552 tasklet_kill(&host->block_tasklet); 1858 if (pnp_dma_valid(pnpdev, 0))
1859 dma = pnp_dma(pnpdev, 0);
1860 else
1861 dma = -1;
1553 1862
1554 wbsd_release_regions(host); 1863 DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma);
1555 1864
1556 mmc_free_host(mmc); 1865 return wbsd_init(&pnpdev->dev, io, irq, dma, 1);
1866}
1557 1867
1558 return 0; 1868static void __devexit wbsd_pnp_remove(struct pnp_dev * dev)
1869{
1870 wbsd_shutdown(&dev->dev, 1);
1559} 1871}
1560 1872
1873#endif /* CONFIG_PNP */
1874
1561/* 1875/*
1562 * Power management 1876 * Power management
1563 */ 1877 */
@@ -1581,17 +1895,7 @@ static int wbsd_resume(struct device *dev, u32 level)
1581#define wbsd_resume NULL 1895#define wbsd_resume NULL
1582#endif 1896#endif
1583 1897
1584static void wbsd_release(struct device *dev) 1898static struct platform_device *wbsd_device;
1585{
1586}
1587
1588static struct platform_device wbsd_device = {
1589 .name = DRIVER_NAME,
1590 .id = -1,
1591 .dev = {
1592 .release = wbsd_release,
1593 },
1594};
1595 1899
1596static struct device_driver wbsd_driver = { 1900static struct device_driver wbsd_driver = {
1597 .name = DRIVER_NAME, 1901 .name = DRIVER_NAME,
@@ -1603,6 +1907,17 @@ static struct device_driver wbsd_driver = {
1603 .resume = wbsd_resume, 1907 .resume = wbsd_resume,
1604}; 1908};
1605 1909
1910#ifdef CONFIG_PNP
1911
1912static struct pnp_driver wbsd_pnp_driver = {
1913 .name = DRIVER_NAME,
1914 .id_table = pnp_dev_table,
1915 .probe = wbsd_pnp_probe,
1916 .remove = wbsd_pnp_remove,
1917};
1918
1919#endif /* CONFIG_PNP */
1920
1606/* 1921/*
1607 * Module loading/unloading 1922 * Module loading/unloading
1608 */ 1923 */
@@ -1615,29 +1930,57 @@ static int __init wbsd_drv_init(void)
1615 ": Winbond W83L51xD SD/MMC card interface driver, " 1930 ": Winbond W83L51xD SD/MMC card interface driver, "
1616 DRIVER_VERSION "\n"); 1931 DRIVER_VERSION "\n");
1617 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); 1932 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1618
1619 result = driver_register(&wbsd_driver);
1620 if (result < 0)
1621 return result;
1622 1933
1623 result = platform_device_register(&wbsd_device); 1934#ifdef CONFIG_PNP
1624 if (result < 0) 1935
1625 return result; 1936 if (!nopnp)
1937 {
1938 result = pnp_register_driver(&wbsd_pnp_driver);
1939 if (result < 0)
1940 return result;
1941 }
1942
1943#endif /* CONFIG_PNP */
1944
1945 if (nopnp)
1946 {
1947 result = driver_register(&wbsd_driver);
1948 if (result < 0)
1949 return result;
1950
1951 wbsd_device = platform_device_register_simple(DRIVER_NAME, -1,
1952 NULL, 0);
1953 if (IS_ERR(wbsd_device))
1954 return PTR_ERR(wbsd_device);
1955 }
1626 1956
1627 return 0; 1957 return 0;
1628} 1958}
1629 1959
1630static void __exit wbsd_drv_exit(void) 1960static void __exit wbsd_drv_exit(void)
1631{ 1961{
1632 platform_device_unregister(&wbsd_device); 1962#ifdef CONFIG_PNP
1963
1964 if (!nopnp)
1965 pnp_unregister_driver(&wbsd_pnp_driver);
1633 1966
1634 driver_unregister(&wbsd_driver); 1967#endif /* CONFIG_PNP */
1968
1969 if (nopnp)
1970 {
1971 platform_device_unregister(wbsd_device);
1972
1973 driver_unregister(&wbsd_driver);
1974 }
1635 1975
1636 DBG("unloaded\n"); 1976 DBG("unloaded\n");
1637} 1977}
1638 1978
1639module_init(wbsd_drv_init); 1979module_init(wbsd_drv_init);
1640module_exit(wbsd_drv_exit); 1980module_exit(wbsd_drv_exit);
1981#ifdef CONFIG_PNP
1982module_param(nopnp, uint, 0444);
1983#endif
1641module_param(io, uint, 0444); 1984module_param(io, uint, 0444);
1642module_param(irq, uint, 0444); 1985module_param(irq, uint, 0444);
1643module_param(dma, int, 0444); 1986module_param(dma, int, 0444);
@@ -1646,6 +1989,9 @@ MODULE_LICENSE("GPL");
1646MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver"); 1989MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
1647MODULE_VERSION(DRIVER_VERSION); 1990MODULE_VERSION(DRIVER_VERSION);
1648 1991
1992#ifdef CONFIG_PNP
1993MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)");
1994#endif
1649MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)"); 1995MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
1650MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)"); 1996MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
1651MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)"); 1997MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-22 04:56:47 -0400