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9b13b682 A |
1 | /* |
2 | * pata_it8213.c - iTE Tech. Inc. IT8213 PATA driver | |
3 | * | |
4 | * The IT8213 is a very Intel ICH like device for timing purposes, having | |
5 | * a similar register layout and the same split clock arrangement. Cable | |
6 | * detection is different, and it does not have slave channels or all the | |
7 | * clutter of later ICH/SATA setups. | |
8 | */ | |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/blkdev.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/device.h> | |
17 | #include <scsi/scsi_host.h> | |
18 | #include <linux/libata.h> | |
19 | #include <linux/ata.h> | |
20 | ||
21 | #define DRV_NAME "pata_it8213" | |
22 | #define DRV_VERSION "0.0.2" | |
23 | ||
24 | /** | |
25 | * it8213_pre_reset - check for 40/80 pin | |
26 | * @ap: Port | |
27 | * | |
5816fbbf AC |
28 | * Filter out ports by the enable bits before doing the normal reset |
29 | * and probe. | |
9b13b682 A |
30 | */ |
31 | ||
32 | static int it8213_pre_reset(struct ata_port *ap) | |
33 | { | |
34 | static const struct pci_bits it8213_enable_bits[] = { | |
35 | { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ | |
36 | }; | |
9b13b682 | 37 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
9b13b682 A |
38 | if (!pci_test_config_bits(pdev, &it8213_enable_bits[ap->port_no])) |
39 | return -ENOENT; | |
9b13b682 A |
40 | return ata_std_prereset(ap); |
41 | } | |
42 | ||
43 | /** | |
5816fbbf | 44 | * it8213_error_handler - Probe specified port on PATA host controller |
9b13b682 A |
45 | * @ap: Port to probe |
46 | * | |
47 | * LOCKING: | |
48 | * None (inherited from caller). | |
49 | */ | |
50 | ||
51 | static void it8213_error_handler(struct ata_port *ap) | |
52 | { | |
53 | ata_bmdma_drive_eh(ap, it8213_pre_reset, ata_std_softreset, NULL, ata_std_postreset); | |
54 | } | |
55 | ||
5816fbbf AC |
56 | /** |
57 | * it8213_cable_detect - check for 40/80 pin | |
58 | * @ap: Port | |
59 | * | |
60 | * Perform cable detection for the 8213 ATA interface. This is | |
61 | * different to the PIIX arrangement | |
62 | */ | |
63 | ||
64 | static int it8213_cable_detect(struct ata_port *ap) | |
65 | { | |
66 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
67 | u8 tmp; | |
68 | pci_read_config_byte(pdev, 0x42, &tmp); | |
69 | if (tmp & 2) /* The initial docs are incorrect */ | |
70 | return ATA_CBL_PATA40; | |
71 | return ATA_CBL_PATA80; | |
72 | } | |
73 | ||
9b13b682 A |
74 | /** |
75 | * it8213_set_piomode - Initialize host controller PATA PIO timings | |
76 | * @ap: Port whose timings we are configuring | |
5816fbbf | 77 | * @adev: Device whose timings we are configuring |
9b13b682 A |
78 | * |
79 | * Set PIO mode for device, in host controller PCI config space. | |
80 | * | |
81 | * LOCKING: | |
82 | * None (inherited from caller). | |
83 | */ | |
84 | ||
85 | static void it8213_set_piomode (struct ata_port *ap, struct ata_device *adev) | |
86 | { | |
87 | unsigned int pio = adev->pio_mode - XFER_PIO_0; | |
88 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
89 | unsigned int idetm_port= ap->port_no ? 0x42 : 0x40; | |
90 | u16 idetm_data; | |
91 | int control = 0; | |
92 | ||
93 | /* | |
94 | * See Intel Document 298600-004 for the timing programing rules | |
95 | * for PIIX/ICH. The 8213 is a clone so very similar | |
96 | */ | |
97 | ||
98 | static const /* ISP RTC */ | |
99 | u8 timings[][2] = { { 0, 0 }, | |
100 | { 0, 0 }, | |
101 | { 1, 0 }, | |
102 | { 2, 1 }, | |
103 | { 2, 3 }, }; | |
104 | ||
105 | if (pio > 2) | |
106 | control |= 1; /* TIME1 enable */ | |
107 | if (ata_pio_need_iordy(adev)) /* PIO 3/4 require IORDY */ | |
108 | control |= 2; /* IORDY enable */ | |
109 | /* Bit 2 is set for ATAPI on the IT8213 - reverse of ICH/PIIX */ | |
110 | if (adev->class != ATA_DEV_ATA) | |
111 | control |= 4; | |
112 | ||
113 | pci_read_config_word(dev, idetm_port, &idetm_data); | |
114 | ||
115 | /* Enable PPE, IE and TIME as appropriate */ | |
116 | ||
117 | if (adev->devno == 0) { | |
118 | idetm_data &= 0xCCF0; | |
119 | idetm_data |= control; | |
120 | idetm_data |= (timings[pio][0] << 12) | | |
121 | (timings[pio][1] << 8); | |
122 | } else { | |
123 | u8 slave_data; | |
124 | ||
125 | idetm_data &= 0xCC0F; | |
126 | idetm_data |= (control << 4); | |
127 | ||
128 | /* Slave timing in seperate register */ | |
129 | pci_read_config_byte(dev, 0x44, &slave_data); | |
130 | slave_data &= 0xF0; | |
131 | slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << 4; | |
132 | pci_write_config_byte(dev, 0x44, slave_data); | |
133 | } | |
134 | ||
135 | idetm_data |= 0x4000; /* Ensure SITRE is enabled */ | |
136 | pci_write_config_word(dev, idetm_port, idetm_data); | |
137 | } | |
138 | ||
139 | /** | |
140 | * it8213_set_dmamode - Initialize host controller PATA DMA timings | |
141 | * @ap: Port whose timings we are configuring | |
142 | * @adev: Device to program | |
143 | * | |
144 | * Set UDMA/MWDMA mode for device, in host controller PCI config space. | |
145 | * This device is basically an ICH alike. | |
146 | * | |
147 | * LOCKING: | |
148 | * None (inherited from caller). | |
149 | */ | |
150 | ||
151 | static void it8213_set_dmamode (struct ata_port *ap, struct ata_device *adev) | |
152 | { | |
153 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
154 | u16 master_data; | |
155 | u8 speed = adev->dma_mode; | |
156 | int devid = adev->devno; | |
157 | u8 udma_enable; | |
158 | ||
159 | static const /* ISP RTC */ | |
160 | u8 timings[][2] = { { 0, 0 }, | |
161 | { 0, 0 }, | |
162 | { 1, 0 }, | |
163 | { 2, 1 }, | |
164 | { 2, 3 }, }; | |
165 | ||
166 | pci_read_config_word(dev, 0x40, &master_data); | |
167 | pci_read_config_byte(dev, 0x48, &udma_enable); | |
168 | ||
169 | if (speed >= XFER_UDMA_0) { | |
170 | unsigned int udma = adev->dma_mode - XFER_UDMA_0; | |
171 | u16 udma_timing; | |
172 | u16 ideconf; | |
173 | int u_clock, u_speed; | |
174 | ||
175 | /* Clocks follow the PIIX style */ | |
176 | u_speed = min(2 - (udma & 1), udma); | |
177 | if (udma == 5) | |
178 | u_clock = 0x1000; /* 100Mhz */ | |
179 | else if (udma > 2) | |
180 | u_clock = 1; /* 66Mhz */ | |
181 | else | |
182 | u_clock = 0; /* 33Mhz */ | |
183 | ||
184 | udma_enable |= (1 << devid); | |
185 | ||
186 | /* Load the UDMA mode number */ | |
187 | pci_read_config_word(dev, 0x4A, &udma_timing); | |
188 | udma_timing &= ~(3 << (4 * devid)); | |
189 | udma_timing |= (udma & 3) << (4 * devid); | |
190 | pci_write_config_word(dev, 0x4A, udma_timing); | |
191 | ||
192 | /* Load the clock selection */ | |
193 | pci_read_config_word(dev, 0x54, &ideconf); | |
194 | ideconf &= ~(0x1001 << devid); | |
195 | ideconf |= u_clock << devid; | |
196 | pci_write_config_word(dev, 0x54, ideconf); | |
197 | } else { | |
198 | /* | |
199 | * MWDMA is driven by the PIO timings. We must also enable | |
200 | * IORDY unconditionally along with TIME1. PPE has already | |
201 | * been set when the PIO timing was set. | |
202 | */ | |
203 | unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0; | |
204 | unsigned int control; | |
205 | u8 slave_data; | |
206 | static const unsigned int needed_pio[3] = { | |
207 | XFER_PIO_0, XFER_PIO_3, XFER_PIO_4 | |
208 | }; | |
209 | int pio = needed_pio[mwdma] - XFER_PIO_0; | |
210 | ||
211 | control = 3; /* IORDY|TIME1 */ | |
212 | ||
213 | /* If the drive MWDMA is faster than it can do PIO then | |
214 | we must force PIO into PIO0 */ | |
215 | ||
216 | if (adev->pio_mode < needed_pio[mwdma]) | |
217 | /* Enable DMA timing only */ | |
218 | control |= 8; /* PIO cycles in PIO0 */ | |
219 | ||
220 | if (devid) { /* Slave */ | |
221 | master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */ | |
222 | master_data |= control << 4; | |
223 | pci_read_config_byte(dev, 0x44, &slave_data); | |
224 | slave_data &= (0x0F + 0xE1 * ap->port_no); | |
225 | /* Load the matching timing */ | |
226 | slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0); | |
227 | pci_write_config_byte(dev, 0x44, slave_data); | |
228 | } else { /* Master */ | |
229 | master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY | |
230 | and master timing bits */ | |
231 | master_data |= control; | |
232 | master_data |= | |
233 | (timings[pio][0] << 12) | | |
234 | (timings[pio][1] << 8); | |
235 | } | |
236 | udma_enable &= ~(1 << devid); | |
237 | pci_write_config_word(dev, 0x40, master_data); | |
238 | } | |
239 | pci_write_config_byte(dev, 0x48, udma_enable); | |
240 | } | |
241 | ||
242 | static struct scsi_host_template it8213_sht = { | |
243 | .module = THIS_MODULE, | |
244 | .name = DRV_NAME, | |
245 | .ioctl = ata_scsi_ioctl, | |
246 | .queuecommand = ata_scsi_queuecmd, | |
247 | .can_queue = ATA_DEF_QUEUE, | |
248 | .this_id = ATA_SHT_THIS_ID, | |
249 | .sg_tablesize = LIBATA_MAX_PRD, | |
250 | .max_sectors = ATA_MAX_SECTORS, | |
251 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | |
252 | .emulated = ATA_SHT_EMULATED, | |
253 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
254 | .proc_name = DRV_NAME, | |
255 | .dma_boundary = ATA_DMA_BOUNDARY, | |
256 | .slave_configure = ata_scsi_slave_config, | |
257 | .bios_param = ata_std_bios_param, | |
438ac6d5 | 258 | #ifdef CONFIG_PM |
9b13b682 A |
259 | .resume = ata_scsi_device_resume, |
260 | .suspend = ata_scsi_device_suspend, | |
438ac6d5 | 261 | #endif |
9b13b682 A |
262 | }; |
263 | ||
264 | static const struct ata_port_operations it8213_ops = { | |
265 | .port_disable = ata_port_disable, | |
266 | .set_piomode = it8213_set_piomode, | |
267 | .set_dmamode = it8213_set_dmamode, | |
268 | .mode_filter = ata_pci_default_filter, | |
269 | ||
270 | .tf_load = ata_tf_load, | |
271 | .tf_read = ata_tf_read, | |
272 | .check_status = ata_check_status, | |
273 | .exec_command = ata_exec_command, | |
274 | .dev_select = ata_std_dev_select, | |
275 | ||
276 | .freeze = ata_bmdma_freeze, | |
277 | .thaw = ata_bmdma_thaw, | |
278 | .error_handler = it8213_error_handler, | |
279 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
5816fbbf | 280 | .cable_detect = it8213_cable_detect, |
9b13b682 A |
281 | |
282 | .bmdma_setup = ata_bmdma_setup, | |
283 | .bmdma_start = ata_bmdma_start, | |
284 | .bmdma_stop = ata_bmdma_stop, | |
285 | .bmdma_status = ata_bmdma_status, | |
286 | .qc_prep = ata_qc_prep, | |
287 | .qc_issue = ata_qc_issue_prot, | |
0d5ff566 | 288 | .data_xfer = ata_data_xfer, |
9b13b682 A |
289 | |
290 | .irq_handler = ata_interrupt, | |
291 | .irq_clear = ata_bmdma_irq_clear, | |
246ce3b6 AI |
292 | .irq_on = ata_irq_on, |
293 | .irq_ack = ata_irq_ack, | |
9b13b682 A |
294 | |
295 | .port_start = ata_port_start, | |
9b13b682 A |
296 | }; |
297 | ||
298 | ||
299 | /** | |
300 | * it8213_init_one - Register 8213 ATA PCI device with kernel services | |
301 | * @pdev: PCI device to register | |
302 | * @ent: Entry in it8213_pci_tbl matching with @pdev | |
303 | * | |
304 | * Called from kernel PCI layer. | |
305 | * | |
306 | * LOCKING: | |
307 | * Inherited from PCI layer (may sleep). | |
308 | * | |
309 | * RETURNS: | |
310 | * Zero on success, or -ERRNO value. | |
311 | */ | |
312 | ||
313 | static int it8213_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
314 | { | |
315 | static int printed_version; | |
316 | static struct ata_port_info info = { | |
317 | .sht = &it8213_sht, | |
318 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | |
319 | .pio_mask = 0x1f, /* pio0-4 */ | |
320 | .mwdma_mask = 0x07, /* mwdma0-2 */ | |
321 | .udma_mask = 0x1f, /* UDMA 100 */ | |
322 | .port_ops = &it8213_ops, | |
323 | }; | |
324 | static struct ata_port_info *port_info[2] = { &info, &info }; | |
325 | ||
326 | if (!printed_version++) | |
327 | dev_printk(KERN_DEBUG, &pdev->dev, | |
328 | "version " DRV_VERSION "\n"); | |
329 | ||
330 | /* Current IT8213 stuff is single port */ | |
331 | return ata_pci_init_one(pdev, port_info, 1); | |
332 | } | |
333 | ||
334 | static const struct pci_device_id it8213_pci_tbl[] = { | |
335 | { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), }, | |
336 | ||
337 | { } /* terminate list */ | |
338 | }; | |
339 | ||
340 | static struct pci_driver it8213_pci_driver = { | |
341 | .name = DRV_NAME, | |
342 | .id_table = it8213_pci_tbl, | |
343 | .probe = it8213_init_one, | |
344 | .remove = ata_pci_remove_one, | |
438ac6d5 | 345 | #ifdef CONFIG_PM |
9b13b682 A |
346 | .suspend = ata_pci_device_suspend, |
347 | .resume = ata_pci_device_resume, | |
438ac6d5 | 348 | #endif |
9b13b682 A |
349 | }; |
350 | ||
351 | static int __init it8213_init(void) | |
352 | { | |
353 | return pci_register_driver(&it8213_pci_driver); | |
354 | } | |
355 | ||
356 | static void __exit it8213_exit(void) | |
357 | { | |
358 | pci_unregister_driver(&it8213_pci_driver); | |
359 | } | |
360 | ||
361 | module_init(it8213_init); | |
362 | module_exit(it8213_exit); | |
363 | ||
364 | MODULE_AUTHOR("Alan Cox"); | |
365 | MODULE_DESCRIPTION("SCSI low-level driver for the ITE 8213"); | |
366 | MODULE_LICENSE("GPL"); | |
367 | MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); | |
368 | MODULE_VERSION(DRV_VERSION); |