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7e45b0e5 AC |
1 | /* |
2 | * pata_winbond.c - Winbond VLB ATA controllers | |
3 | * (C) 2006 Red Hat <alan@redhat.com> | |
4 | * | |
5 | * Support for the Winbond 83759A when operating in advanced mode. | |
6 | * Multichip mode is not currently supported. | |
7 | */ | |
f20b16ff | 8 | |
7e45b0e5 AC |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> | |
11 | #include <linux/pci.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/blkdev.h> | |
14 | #include <linux/delay.h> | |
15 | #include <scsi/scsi_host.h> | |
16 | #include <linux/libata.h> | |
17 | #include <linux/platform_device.h> | |
18 | ||
19 | #define DRV_NAME "pata_winbond" | |
20 | #define DRV_VERSION "0.0.1" | |
21 | ||
22 | #define NR_HOST 4 /* Two winbond controllers, two channels each */ | |
23 | ||
24 | struct winbond_data { | |
25 | unsigned long config; | |
26 | struct platform_device *platform_dev; | |
27 | }; | |
28 | ||
29 | static struct ata_host *winbond_host[NR_HOST]; | |
30 | static struct winbond_data winbond_data[NR_HOST]; | |
31 | static int nr_winbond_host; | |
32 | ||
33 | #ifdef MODULE | |
34 | static int probe_winbond = 1; | |
35 | #else | |
36 | static int probe_winbond; | |
37 | #endif | |
38 | ||
39 | static spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED; | |
40 | ||
41 | static void winbond_writecfg(unsigned long port, u8 reg, u8 val) | |
42 | { | |
43 | unsigned long flags; | |
44 | spin_lock_irqsave(&winbond_lock, flags); | |
45 | outb(reg, port + 0x01); | |
46 | outb(val, port + 0x02); | |
47 | spin_unlock_irqrestore(&winbond_lock, flags); | |
48 | } | |
49 | ||
50 | static u8 winbond_readcfg(unsigned long port, u8 reg) | |
51 | { | |
52 | u8 val; | |
53 | ||
54 | unsigned long flags; | |
55 | spin_lock_irqsave(&winbond_lock, flags); | |
56 | outb(reg, port + 0x01); | |
57 | val = inb(port + 0x02); | |
58 | spin_unlock_irqrestore(&winbond_lock, flags); | |
59 | ||
60 | return val; | |
61 | } | |
62 | ||
63 | static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
64 | { | |
65 | struct ata_timing t; | |
66 | struct winbond_data *winbond = ap->host->private_data; | |
67 | int active, recovery; | |
68 | u8 reg; | |
69 | int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2); | |
70 | ||
71 | reg = winbond_readcfg(winbond->config, 0x81); | |
f20b16ff | 72 | |
7e45b0e5 AC |
73 | /* Get the timing data in cycles */ |
74 | if (reg & 0x40) /* Fast VLB bus, assume 50MHz */ | |
75 | ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); | |
76 | else | |
77 | ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); | |
78 | ||
79 | active = (FIT(t.active, 3, 17) - 1) & 0x0F; | |
80 | recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F; | |
81 | timing = (active << 4) | recovery; | |
82 | winbond_writecfg(winbond->config, timing, reg); | |
f20b16ff | 83 | |
7e45b0e5 | 84 | /* Load the setup timing */ |
f20b16ff | 85 | |
7e45b0e5 AC |
86 | reg = 0x35; |
87 | if (adev->class != ATA_DEV_ATA) | |
88 | reg |= 0x08; /* FIFO off */ | |
89 | if (!ata_pio_need_iordy(adev)) | |
90 | reg |= 0x02; /* IORDY off */ | |
91 | reg |= (FIT(t.setup, 0, 3) << 6); | |
92 | winbond_writecfg(winbond->config, timing + 1, reg); | |
93 | } | |
94 | ||
95 | ||
96 | static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data) | |
97 | { | |
98 | struct ata_port *ap = adev->ap; | |
99 | int slop = buflen & 3; | |
100 | ||
101 | if (ata_id_has_dword_io(adev->id)) { | |
102 | if (write_data) | |
103 | outsl(ap->ioaddr.data_addr, buf, buflen >> 2); | |
104 | else | |
105 | insl(ap->ioaddr.data_addr, buf, buflen >> 2); | |
106 | ||
107 | if (unlikely(slop)) { | |
108 | u32 pad; | |
109 | if (write_data) { | |
110 | memcpy(&pad, buf + buflen - slop, slop); | |
111 | outl(le32_to_cpu(pad), ap->ioaddr.data_addr); | |
112 | } else { | |
113 | pad = cpu_to_le16(inl(ap->ioaddr.data_addr)); | |
114 | memcpy(buf + buflen - slop, &pad, slop); | |
115 | } | |
116 | } | |
117 | } else | |
118 | ata_pio_data_xfer(adev, buf, buflen, write_data); | |
119 | } | |
120 | ||
121 | static struct scsi_host_template winbond_sht = { | |
122 | .module = THIS_MODULE, | |
123 | .name = DRV_NAME, | |
124 | .ioctl = ata_scsi_ioctl, | |
125 | .queuecommand = ata_scsi_queuecmd, | |
126 | .can_queue = ATA_DEF_QUEUE, | |
127 | .this_id = ATA_SHT_THIS_ID, | |
128 | .sg_tablesize = LIBATA_MAX_PRD, | |
7e45b0e5 AC |
129 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
130 | .emulated = ATA_SHT_EMULATED, | |
131 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
132 | .proc_name = DRV_NAME, | |
133 | .dma_boundary = ATA_DMA_BOUNDARY, | |
134 | .slave_configure = ata_scsi_slave_config, | |
c972b60b | 135 | .slave_destroy = ata_scsi_slave_destroy, |
7e45b0e5 AC |
136 | .bios_param = ata_std_bios_param, |
137 | }; | |
138 | ||
139 | static struct ata_port_operations winbond_port_ops = { | |
140 | .port_disable = ata_port_disable, | |
141 | .set_piomode = winbond_set_piomode, | |
142 | ||
143 | .tf_load = ata_tf_load, | |
144 | .tf_read = ata_tf_read, | |
145 | .check_status = ata_check_status, | |
146 | .exec_command = ata_exec_command, | |
147 | .dev_select = ata_std_dev_select, | |
148 | ||
149 | .freeze = ata_bmdma_freeze, | |
150 | .thaw = ata_bmdma_thaw, | |
151 | .error_handler = ata_bmdma_error_handler, | |
152 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
153 | ||
154 | .qc_prep = ata_qc_prep, | |
155 | .qc_issue = ata_qc_issue_prot, | |
156 | ||
157 | .data_xfer = winbond_data_xfer, | |
158 | ||
159 | .irq_handler = ata_interrupt, | |
160 | .irq_clear = ata_bmdma_irq_clear, | |
161 | ||
162 | .port_start = ata_port_start, | |
7e45b0e5 AC |
163 | }; |
164 | ||
165 | /** | |
166 | * winbond_init_one - attach a winbond interface | |
167 | * @type: Type to display | |
168 | * @io: I/O port start | |
169 | * @irq: interrupt line | |
170 | * @fast: True if on a > 33Mhz VLB | |
171 | * | |
172 | * Register a VLB bus IDE interface. Such interfaces are PIO and we | |
173 | * assume do not support IRQ sharing. | |
174 | */ | |
175 | ||
176 | static __init int winbond_init_one(unsigned long port) | |
177 | { | |
178 | struct ata_probe_ent ae; | |
179 | struct platform_device *pdev; | |
180 | int ret; | |
181 | u8 reg; | |
182 | int i; | |
183 | ||
184 | reg = winbond_readcfg(port, 0x81); | |
185 | reg |= 0x80; /* jumpered mode off */ | |
186 | winbond_writecfg(port, 0x81, reg); | |
187 | reg = winbond_readcfg(port, 0x83); | |
188 | reg |= 0xF0; /* local control */ | |
189 | winbond_writecfg(port, 0x83, reg); | |
190 | reg = winbond_readcfg(port, 0x85); | |
191 | reg |= 0xF0; /* programmable timing */ | |
192 | winbond_writecfg(port, 0x85, reg); | |
193 | ||
194 | reg = winbond_readcfg(port, 0x81); | |
f20b16ff | 195 | |
7e45b0e5 AC |
196 | if (!(reg & 0x03)) /* Disabled */ |
197 | return 0; | |
198 | ||
199 | for (i = 0; i < 2 ; i ++) { | |
200 | ||
f20b16ff | 201 | if (reg & (1 << i)) { |
7e45b0e5 AC |
202 | /* |
203 | * Fill in a probe structure first of all | |
204 | */ | |
205 | ||
206 | pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0); | |
9825d73c AM |
207 | if (IS_ERR(pdev)) |
208 | return PTR_ERR(pdev); | |
7e45b0e5 AC |
209 | |
210 | memset(&ae, 0, sizeof(struct ata_probe_ent)); | |
211 | INIT_LIST_HEAD(&ae.node); | |
212 | ae.dev = &pdev->dev; | |
213 | ||
214 | ae.port_ops = &winbond_port_ops; | |
215 | ae.pio_mask = 0x1F; | |
216 | ||
217 | ae.sht = &winbond_sht; | |
f20b16ff | 218 | |
7e45b0e5 AC |
219 | ae.n_ports = 1; |
220 | ae.irq = 14 + i; | |
221 | ae.irq_flags = 0; | |
222 | ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST; | |
223 | ae.port[0].cmd_addr = 0x1F0 - (0x80 * i); | |
224 | ae.port[0].altstatus_addr = ae.port[0].cmd_addr + 0x0206; | |
225 | ae.port[0].ctl_addr = ae.port[0].altstatus_addr; | |
226 | ata_std_ports(&ae.port[0]); | |
227 | /* | |
228 | * Hook in a private data structure per channel | |
229 | */ | |
230 | ae.private_data = &winbond_data[nr_winbond_host]; | |
231 | winbond_data[nr_winbond_host].config = port; | |
232 | winbond_data[nr_winbond_host].platform_dev = pdev; | |
233 | ||
234 | ret = ata_device_add(&ae); | |
235 | if (ret == 0) { | |
236 | platform_device_unregister(pdev); | |
237 | return -ENODEV; | |
238 | } | |
239 | winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev); | |
240 | } | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | /** | |
247 | * winbond_init - attach winbond interfaces | |
248 | * | |
249 | * Attach winbond IDE interfaces by scanning the ports it may occupy. | |
250 | */ | |
251 | ||
252 | static __init int winbond_init(void) | |
253 | { | |
254 | static const unsigned long config[2] = { 0x130, 0x1B0 }; | |
255 | ||
256 | int ct = 0; | |
257 | int i; | |
f20b16ff | 258 | |
7e45b0e5 AC |
259 | if (probe_winbond == 0) |
260 | return -ENODEV; | |
261 | ||
262 | /* | |
263 | * Check both base addresses | |
264 | */ | |
265 | ||
266 | for (i = 0; i < 2; i++) { | |
267 | if (probe_winbond & (1<<i)) { | |
268 | int ret = 0; | |
269 | unsigned long port = config[i]; | |
270 | ||
271 | if (request_region(port, 2, "pata_winbond")) { | |
272 | ret = winbond_init_one(port); | |
273 | if(ret <= 0) | |
274 | release_region(port, 2); | |
275 | else ct+= ret; | |
276 | } | |
277 | } | |
278 | } | |
279 | if (ct != 0) | |
280 | return 0; | |
281 | return -ENODEV; | |
282 | } | |
283 | ||
284 | static __exit void winbond_exit(void) | |
285 | { | |
286 | int i; | |
287 | ||
288 | for (i = 0; i < nr_winbond_host; i++) { | |
24dc5f33 | 289 | ata_host_detach(winbond_host[i]); |
7e45b0e5 AC |
290 | release_region(winbond_data[i].config, 2); |
291 | platform_device_unregister(winbond_data[i].platform_dev); | |
292 | } | |
293 | } | |
294 | ||
295 | MODULE_AUTHOR("Alan Cox"); | |
296 | MODULE_DESCRIPTION("low-level driver for Winbond VL ATA"); | |
297 | MODULE_LICENSE("GPL"); | |
298 | MODULE_VERSION(DRV_VERSION); | |
299 | ||
300 | module_init(winbond_init); | |
301 | module_exit(winbond_exit); | |
302 | ||
303 | module_param(probe_winbond, int, 0); | |
304 |