diff options
-rw-r--r-- | drivers/ata/Kconfig | 10 | ||||
-rw-r--r-- | drivers/ata/Makefile | 1 | ||||
-rw-r--r-- | drivers/ata/pata_cmd640.c | 298 |
3 files changed, 309 insertions, 0 deletions
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 7bdbe5a914d..1410907d1ed 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig | |||
@@ -209,6 +209,16 @@ config PATA_ATIIXP | |||
209 | 209 | ||
210 | If unsure, say N. | 210 | If unsure, say N. |
211 | 211 | ||
212 | config PATA_CMD640_PCI | ||
213 | tristate "CMD640 PCI PATA support (Very Experimental)" | ||
214 | depends on PCI && EXPERIMENTAL | ||
215 | help | ||
216 | This option enables support for the CMD640 PCI IDE | ||
217 | interface chip. Only the primary channel is currently | ||
218 | supported. | ||
219 | |||
220 | If unsure, say N. | ||
221 | |||
212 | config PATA_CMD64X | 222 | config PATA_CMD64X |
213 | tristate "CMD64x PATA support (Very Experimental)" | 223 | tristate "CMD64x PATA support (Very Experimental)" |
214 | depends on PCI&& EXPERIMENTAL | 224 | depends on PCI&& EXPERIMENTAL |
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index 13d7397e000..b7055e30265 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile | |||
@@ -22,6 +22,7 @@ obj-$(CONFIG_PATA_ALI) += pata_ali.o | |||
22 | obj-$(CONFIG_PATA_AMD) += pata_amd.o | 22 | obj-$(CONFIG_PATA_AMD) += pata_amd.o |
23 | obj-$(CONFIG_PATA_ARTOP) += pata_artop.o | 23 | obj-$(CONFIG_PATA_ARTOP) += pata_artop.o |
24 | obj-$(CONFIG_PATA_ATIIXP) += pata_atiixp.o | 24 | obj-$(CONFIG_PATA_ATIIXP) += pata_atiixp.o |
25 | obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o | ||
25 | obj-$(CONFIG_PATA_CMD64X) += pata_cmd64x.o | 26 | obj-$(CONFIG_PATA_CMD64X) += pata_cmd64x.o |
26 | obj-$(CONFIG_PATA_CS5520) += pata_cs5520.o | 27 | obj-$(CONFIG_PATA_CS5520) += pata_cs5520.o |
27 | obj-$(CONFIG_PATA_CS5530) += pata_cs5530.o | 28 | obj-$(CONFIG_PATA_CS5530) += pata_cs5530.o |
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c new file mode 100644 index 00000000000..4d01d469241 --- /dev/null +++ b/drivers/ata/pata_cmd640.c | |||
@@ -0,0 +1,298 @@ | |||
1 | /* | ||
2 | * pata_cmd640.c - CMD640 PCI PATA for new ATA layer | ||
3 | * (C) 2007 Red Hat Inc | ||
4 | * Alan Cox <alan@redhat.com> | ||
5 | * | ||
6 | * Based upon | ||
7 | * linux/drivers/ide/pci/cmd640.c Version 1.02 Sep 01, 1996 | ||
8 | * | ||
9 | * Copyright (C) 1995-1996 Linus Torvalds & authors (see driver) | ||
10 | * | ||
11 | * This drives only the PCI version of the controller. If you have a | ||
12 | * VLB one then we have enough docs to support it but you can write | ||
13 | * your own code. | ||
14 | */ | ||
15 | |||
16 | #include <linux/kernel.h> | ||
17 | #include <linux/module.h> | ||
18 | #include <linux/pci.h> | ||
19 | #include <linux/init.h> | ||
20 | #include <linux/blkdev.h> | ||
21 | #include <linux/delay.h> | ||
22 | #include <scsi/scsi_host.h> | ||
23 | #include <linux/libata.h> | ||
24 | |||
25 | #define DRV_NAME "pata_cmd640" | ||
26 | #define DRV_VERSION "0.0.3" | ||
27 | |||
28 | struct cmd640_reg { | ||
29 | int last; | ||
30 | u8 reg58[ATA_MAX_DEVICES]; | ||
31 | }; | ||
32 | |||
33 | enum { | ||
34 | CFR = 0x50, | ||
35 | CNTRL = 0x51, | ||
36 | CMDTIM = 0x52, | ||
37 | ARTIM0 = 0x53, | ||
38 | DRWTIM0 = 0x54, | ||
39 | ARTIM23 = 0x57, | ||
40 | DRWTIM23 = 0x58, | ||
41 | BRST = 0x59 | ||
42 | }; | ||
43 | |||
44 | /** | ||
45 | * cmd640_set_piomode - set initial PIO mode data | ||
46 | * @adev: ATA device | ||
47 | * | ||
48 | * Called to do the PIO mode setup. | ||
49 | */ | ||
50 | |||
51 | static void cmd640_set_piomode(struct ata_port *ap, struct ata_device *adev) | ||
52 | { | ||
53 | struct cmd640_reg *timing = ap->private_data; | ||
54 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | ||
55 | struct ata_timing t; | ||
56 | const unsigned long T = 1000000 / 33; | ||
57 | const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 }; | ||
58 | u8 reg; | ||
59 | int arttim = ARTIM0 + 2 * adev->devno; | ||
60 | struct ata_device *pair = ata_dev_pair(adev); | ||
61 | |||
62 | if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) { | ||
63 | printk(KERN_ERR DRV_NAME ": mode computation failed.\n"); | ||
64 | return; | ||
65 | } | ||
66 | |||
67 | /* The second channel has shared timings and the setup timing is | ||
68 | messy to switch to merge it for worst case */ | ||
69 | if (ap->port_no && pair) { | ||
70 | struct ata_timing p; | ||
71 | ata_timing_compute(pair, pair->pio_mode, &p, T, 1); | ||
72 | ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP); | ||
73 | } | ||
74 | |||
75 | /* Make the timings fit */ | ||
76 | if (t.recover > 16) { | ||
77 | t.active += t.recover - 16; | ||
78 | t.recover = 16; | ||
79 | } | ||
80 | if (t.active > 16) | ||
81 | t.active = 16; | ||
82 | |||
83 | /* Now convert the clocks into values we can actually stuff into | ||
84 | the chip */ | ||
85 | |||
86 | if (t.recover > 1) | ||
87 | t.recover--; /* 640B only */ | ||
88 | else | ||
89 | t.recover = 15; | ||
90 | |||
91 | if (t.setup > 4) | ||
92 | t.setup = 0xC0; | ||
93 | else | ||
94 | t.setup = setup_data[t.setup]; | ||
95 | |||
96 | if (ap->port_no == 0) { | ||
97 | t.active &= 0x0F; /* 0 = 16 */ | ||
98 | |||
99 | /* Load setup timing */ | ||
100 | pci_read_config_byte(pdev, arttim, ®); | ||
101 | reg &= 0x3F; | ||
102 | reg |= t.setup; | ||
103 | pci_write_config_byte(pdev, arttim, reg); | ||
104 | |||
105 | /* Load active/recovery */ | ||
106 | pci_write_config_byte(pdev, arttim + 1, (t.active << 4) | t.recover); | ||
107 | } else { | ||
108 | /* Save the shared timings for channel, they will be loaded | ||
109 | by qc_issue_prot. Reloading the setup time is expensive | ||
110 | so we keep a merged one loaded */ | ||
111 | pci_read_config_byte(pdev, ARTIM23, ®); | ||
112 | reg &= 0x3F; | ||
113 | reg |= t.setup; | ||
114 | pci_write_config_byte(pdev, ARTIM23, reg); | ||
115 | timing->reg58[adev->devno] = (t.active << 4) | t.recover; | ||
116 | } | ||
117 | } | ||
118 | |||
119 | |||
120 | /** | ||
121 | * cmd640_qc_issue_prot - command preparation hook | ||
122 | * @qc: Command to be issued | ||
123 | * | ||
124 | * Channel 1 has shared timings. We must reprogram the | ||
125 | * clock each drive 2/3 switch we do. | ||
126 | */ | ||
127 | |||
128 | static unsigned int cmd640_qc_issue_prot(struct ata_queued_cmd *qc) | ||
129 | { | ||
130 | struct ata_port *ap = qc->ap; | ||
131 | struct ata_device *adev = qc->dev; | ||
132 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | ||
133 | struct cmd640_reg *timing = ap->private_data; | ||
134 | |||
135 | if (ap->port_no != 0 && adev->devno != timing->last) { | ||
136 | pci_write_config_byte(pdev, DRWTIM23, timing->reg58[adev->devno]); | ||
137 | timing->last = adev->devno; | ||
138 | } | ||
139 | return ata_qc_issue_prot(qc); | ||
140 | } | ||
141 | |||
142 | /** | ||
143 | * cmd640_port_start - port setup | ||
144 | * @ap: ATA port being set up | ||
145 | * | ||
146 | * The CMD640 needs to maintain private data structures so we | ||
147 | * allocate space here. | ||
148 | */ | ||
149 | |||
150 | static int cmd640_port_start(struct ata_port *ap) | ||
151 | { | ||
152 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | ||
153 | struct cmd640_reg *timing; | ||
154 | |||
155 | int ret = ata_port_start(ap); | ||
156 | if (ret < 0) | ||
157 | return ret; | ||
158 | |||
159 | timing = devm_kzalloc(&pdev->dev, sizeof(struct cmd640_reg), GFP_KERNEL); | ||
160 | if (timing == NULL) | ||
161 | return -ENOMEM; | ||
162 | timing->last = -1; /* Force a load */ | ||
163 | ap->private_data = timing; | ||
164 | return ret; | ||
165 | } | ||
166 | |||
167 | static struct scsi_host_template cmd640_sht = { | ||
168 | .module = THIS_MODULE, | ||
169 | .name = DRV_NAME, | ||
170 | .ioctl = ata_scsi_ioctl, | ||
171 | .queuecommand = ata_scsi_queuecmd, | ||
172 | .can_queue = ATA_DEF_QUEUE, | ||
173 | .this_id = ATA_SHT_THIS_ID, | ||
174 | .sg_tablesize = LIBATA_MAX_PRD, | ||
175 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | ||
176 | .emulated = ATA_SHT_EMULATED, | ||
177 | .use_clustering = ATA_SHT_USE_CLUSTERING, | ||
178 | .proc_name = DRV_NAME, | ||
179 | .dma_boundary = ATA_DMA_BOUNDARY, | ||
180 | .slave_configure = ata_scsi_slave_config, | ||
181 | .slave_destroy = ata_scsi_slave_destroy, | ||
182 | .bios_param = ata_std_bios_param, | ||
183 | .resume = ata_scsi_device_resume, | ||
184 | .suspend = ata_scsi_device_suspend, | ||
185 | }; | ||
186 | |||
187 | static struct ata_port_operations cmd640_port_ops = { | ||
188 | .port_disable = ata_port_disable, | ||
189 | .set_piomode = cmd640_set_piomode, | ||
190 | .mode_filter = ata_pci_default_filter, | ||
191 | .tf_load = ata_tf_load, | ||
192 | .tf_read = ata_tf_read, | ||
193 | .check_status = ata_check_status, | ||
194 | .exec_command = ata_exec_command, | ||
195 | .dev_select = ata_std_dev_select, | ||
196 | |||
197 | .freeze = ata_bmdma_freeze, | ||
198 | .thaw = ata_bmdma_thaw, | ||
199 | .error_handler = ata_bmdma_error_handler, | ||
200 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | ||
201 | .cable_detect = ata_cable_40wire, | ||
202 | |||
203 | .bmdma_setup = ata_bmdma_setup, | ||
204 | .bmdma_start = ata_bmdma_start, | ||
205 | .bmdma_stop = ata_bmdma_stop, | ||
206 | .bmdma_status = ata_bmdma_status, | ||
207 | |||
208 | .qc_prep = ata_qc_prep, | ||
209 | .qc_issue = cmd640_qc_issue_prot, | ||
210 | |||
211 | /* In theory this is not needed once we kill the prefetcher */ | ||
212 | .data_xfer = ata_data_xfer_noirq, | ||
213 | |||
214 | .irq_handler = ata_interrupt, | ||
215 | .irq_clear = ata_bmdma_irq_clear, | ||
216 | .irq_on = ata_irq_on, | ||
217 | .irq_ack = ata_irq_ack, | ||
218 | |||
219 | .port_start = cmd640_port_start, | ||
220 | }; | ||
221 | |||
222 | static int cmd640_init_one(struct pci_dev *pdev, const struct pci_device_id *id) | ||
223 | { | ||
224 | u8 r; | ||
225 | u8 ctrl; | ||
226 | |||
227 | static struct ata_port_info info = { | ||
228 | .sht = &cmd640_sht, | ||
229 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, | ||
230 | .pio_mask = 0x1f, | ||
231 | .port_ops = &cmd640_port_ops | ||
232 | }; | ||
233 | |||
234 | static struct ata_port_info *port_info[2] = { &info, &info }; | ||
235 | |||
236 | /* CMD640 detected, commiserations */ | ||
237 | pci_write_config_byte(pdev, 0x5C, 0x00); | ||
238 | /* Get version info */ | ||
239 | pci_read_config_byte(pdev, CFR, &r); | ||
240 | /* PIO0 command cycles */ | ||
241 | pci_write_config_byte(pdev, CMDTIM, 0); | ||
242 | /* 512 byte bursts (sector) */ | ||
243 | pci_write_config_byte(pdev, BRST, 0x40); | ||
244 | /* | ||
245 | * A reporter a long time ago | ||
246 | * Had problems with the data fifo | ||
247 | * So don't run the risk | ||
248 | * Of putting crap on the disk | ||
249 | * For its better just to go slow | ||
250 | */ | ||
251 | /* Do channel 0 */ | ||
252 | pci_read_config_byte(pdev, CNTRL, &ctrl); | ||
253 | pci_write_config_byte(pdev, CNTRL, ctrl | 0xC0); | ||
254 | /* Ditto for channel 1 */ | ||
255 | pci_read_config_byte(pdev, ARTIM23, &ctrl); | ||
256 | ctrl |= 0x0C; | ||
257 | pci_write_config_byte(pdev, ARTIM23, ctrl); | ||
258 | |||
259 | return ata_pci_init_one(pdev, port_info, 2); | ||
260 | } | ||
261 | |||
262 | static int cmd640_reinit_one(struct pci_dev *pdev) | ||
263 | { | ||
264 | return ata_pci_device_resume(pdev); | ||
265 | } | ||
266 | |||
267 | static const struct pci_device_id cmd640[] = { | ||
268 | { PCI_VDEVICE(CMD, 0x640), 0 }, | ||
269 | { }, | ||
270 | }; | ||
271 | |||
272 | static struct pci_driver cmd640_pci_driver = { | ||
273 | .name = DRV_NAME, | ||
274 | .id_table = cmd640, | ||
275 | .probe = cmd640_init_one, | ||
276 | .remove = ata_pci_remove_one, | ||
277 | .suspend = ata_pci_device_suspend, | ||
278 | .resume = cmd640_reinit_one, | ||
279 | }; | ||
280 | |||
281 | static int __init cmd640_init(void) | ||
282 | { | ||
283 | return pci_register_driver(&cmd640_pci_driver); | ||
284 | } | ||
285 | |||
286 | static void __exit cmd640_exit(void) | ||
287 | { | ||
288 | pci_unregister_driver(&cmd640_pci_driver); | ||
289 | } | ||
290 | |||
291 | MODULE_AUTHOR("Alan Cox"); | ||
292 | MODULE_DESCRIPTION("low-level driver for CMD640 PATA controllers"); | ||
293 | MODULE_LICENSE("GPL"); | ||
294 | MODULE_DEVICE_TABLE(pci, cmd640); | ||
295 | MODULE_VERSION(DRV_VERSION); | ||
296 | |||
297 | module_init(cmd640_init); | ||
298 | module_exit(cmd640_exit); | ||