2 * Palmchip bk3710 IDE controller
4 * Copyright (C) 2006 Texas Instruments.
5 * Copyright (C) 2007 MontaVista Software, Inc., <source@mvista.com>
7 * ----------------------------------------------------------------------------
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * ----------------------------------------------------------------------------
26 #include <linux/types.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/ioport.h>
30 #include <linux/hdreg.h>
31 #include <linux/ide.h>
32 #include <linux/delay.h>
33 #include <linux/init.h>
34 #include <linux/clk.h>
35 #include <linux/platform_device.h>
37 /* Offset of the primary interface registers */
38 #define IDE_PALM_ATA_PRI_REG_OFFSET 0x1F0
40 /* Primary Control Offset */
41 #define IDE_PALM_ATA_PRI_CTL_OFFSET 0x3F6
44 * PalmChip 3710 IDE Controller UDMA timing structure Definition
46 struct palm_bk3710_udmatiming {
47 unsigned int rptime; /* Ready to pause time */
48 unsigned int cycletime; /* Cycle Time */
51 #define BK3710_BMICP 0x00
52 #define BK3710_BMISP 0x02
53 #define BK3710_BMIDTP 0x04
54 #define BK3710_BMICS 0x08
55 #define BK3710_BMISS 0x0A
56 #define BK3710_BMIDTS 0x0C
57 #define BK3710_IDETIMP 0x40
58 #define BK3710_IDETIMS 0x42
59 #define BK3710_SIDETIM 0x44
60 #define BK3710_SLEWCTL 0x45
61 #define BK3710_IDESTATUS 0x47
62 #define BK3710_UDMACTL 0x48
63 #define BK3710_UDMATIM 0x4A
64 #define BK3710_MISCCTL 0x50
65 #define BK3710_REGSTB 0x54
66 #define BK3710_REGRCVR 0x58
67 #define BK3710_DATSTB 0x5C
68 #define BK3710_DATRCVR 0x60
69 #define BK3710_DMASTB 0x64
70 #define BK3710_DMARCVR 0x68
71 #define BK3710_UDMASTB 0x6C
72 #define BK3710_UDMATRP 0x70
73 #define BK3710_UDMAENV 0x74
74 #define BK3710_IORDYTMP 0x78
75 #define BK3710_IORDYTMS 0x7C
77 #include "../ide-timing.h"
79 static long ide_palm_clk;
81 static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = {
82 {160, 240}, /* UDMA Mode 0 */
83 {125, 160}, /* UDMA Mode 1 */
84 {100, 120}, /* UDMA Mode 2 */
85 {100, 90}, /* UDMA Mode 3 */
86 {85, 60}, /* UDMA Mode 4 */
89 static struct clk *ideclkp;
91 static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev,
99 t0 = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].cycletime,
101 tenv = DIV_ROUND_UP(20, ide_palm_clk) - 1;
102 trp = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].rptime,
105 /* udmatim Register */
106 val16 = readw(base + BK3710_UDMATIM) & (dev ? 0xFF0F : 0xFFF0);
107 val16 |= (mode << (dev ? 4 : 0));
108 writew(val16, base + BK3710_UDMATIM);
110 /* udmastb Ultra DMA Access Strobe Width */
111 val32 = readl(base + BK3710_UDMASTB) & (0xFF << (dev ? 0 : 8));
112 val32 |= (t0 << (dev ? 8 : 0));
113 writel(val32, base + BK3710_UDMASTB);
115 /* udmatrp Ultra DMA Ready to Pause Time */
116 val32 = readl(base + BK3710_UDMATRP) & (0xFF << (dev ? 0 : 8));
117 val32 |= (trp << (dev ? 8 : 0));
118 writel(val32, base + BK3710_UDMATRP);
120 /* udmaenv Ultra DMA envelop Time */
121 val32 = readl(base + BK3710_UDMAENV) & (0xFF << (dev ? 0 : 8));
122 val32 |= (tenv << (dev ? 8 : 0));
123 writel(val32, base + BK3710_UDMAENV);
125 /* Enable UDMA for Device */
126 val16 = readw(base + BK3710_UDMACTL) | (1 << dev);
127 writew(val16, base + BK3710_UDMACTL);
130 static void palm_bk3710_setdmamode(void __iomem *base, unsigned int dev,
131 unsigned short min_cycle,
137 struct ide_timing *t;
140 t = ide_timing_find_mode(mode);
141 cycletime = max_t(int, t->cycle, min_cycle);
144 t0 = DIV_ROUND_UP(cycletime, ide_palm_clk);
145 td = DIV_ROUND_UP(t->active, ide_palm_clk);
149 val32 = readl(base + BK3710_DMASTB) & (0xFF << (dev ? 0 : 8));
150 val32 |= (td << (dev ? 8 : 0));
151 writel(val32, base + BK3710_DMASTB);
153 val32 = readl(base + BK3710_DMARCVR) & (0xFF << (dev ? 0 : 8));
154 val32 |= (tkw << (dev ? 8 : 0));
155 writel(val32, base + BK3710_DMARCVR);
157 /* Disable UDMA for Device */
158 val16 = readw(base + BK3710_UDMACTL) & ~(1 << dev);
159 writew(val16, base + BK3710_UDMACTL);
162 static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
163 unsigned int dev, unsigned int cycletime,
168 struct ide_timing *t;
171 t0 = DIV_ROUND_UP(cycletime, ide_palm_clk);
172 t2 = DIV_ROUND_UP(ide_timing_find_mode(XFER_PIO_0 + mode)->active,
178 val32 = readl(base + BK3710_DATSTB) & (0xFF << (dev ? 0 : 8));
179 val32 |= (t2 << (dev ? 8 : 0));
180 writel(val32, base + BK3710_DATSTB);
182 val32 = readl(base + BK3710_DATRCVR) & (0xFF << (dev ? 0 : 8));
183 val32 |= (t2i << (dev ? 8 : 0));
184 writel(val32, base + BK3710_DATRCVR);
186 if (mate && mate->present) {
187 u8 mode2 = ide_get_best_pio_mode(mate, 255, 4);
194 t = ide_timing_find_mode(XFER_PIO_0 + mode);
195 t0 = DIV_ROUND_UP(t->cyc8b, ide_palm_clk);
196 t2 = DIV_ROUND_UP(t->act8b, ide_palm_clk);
201 val32 = readl(base + BK3710_REGSTB) & (0xFF << (dev ? 0 : 8));
202 val32 |= (t2 << (dev ? 8 : 0));
203 writel(val32, base + BK3710_REGSTB);
205 val32 = readl(base + BK3710_REGRCVR) & (0xFF << (dev ? 0 : 8));
206 val32 |= (t2i << (dev ? 8 : 0));
207 writel(val32, base + BK3710_REGRCVR);
210 static void palm_bk3710_set_dma_mode(ide_drive_t *drive, u8 xferspeed)
212 int is_slave = drive->dn & 1;
213 void __iomem *base = (void *)drive->hwif->dma_base;
215 if (xferspeed >= XFER_UDMA_0) {
216 palm_bk3710_setudmamode(base, is_slave,
217 xferspeed - XFER_UDMA_0);
219 palm_bk3710_setdmamode(base, is_slave, drive->id->eide_dma_min,
224 static void palm_bk3710_set_pio_mode(ide_drive_t *drive, u8 pio)
226 unsigned int cycle_time;
227 int is_slave = drive->dn & 1;
229 void __iomem *base = (void *)drive->hwif->dma_base;
232 * Obtain the drive PIO data for tuning the Palm Chip registers
234 cycle_time = ide_pio_cycle_time(drive, pio);
235 mate = ide_get_paired_drive(drive);
236 palm_bk3710_setpiomode(base, mate, is_slave, cycle_time, pio);
239 static void __devinit palm_bk3710_chipinit(void __iomem *base)
242 * enable the reset_en of ATA controller so that when ata signals
243 * are brought out, by writing into device config. at that
244 * time por_n signal should not be 'Z' and have a stable value.
246 writel(0x0300, base + BK3710_MISCCTL);
248 /* wait for some time and deassert the reset of ATA Device. */
251 /* Deassert the Reset */
252 writel(0x0200, base + BK3710_MISCCTL);
255 * Program the IDETIMP Register Value based on the following assumptions
257 * (ATA_IDETIMP_IDEEN , ENABLE ) |
258 * (ATA_IDETIMP_SLVTIMEN , DISABLE) |
259 * (ATA_IDETIMP_RDYSMPL , 70NS) |
260 * (ATA_IDETIMP_RDYRCVRY , 50NS) |
261 * (ATA_IDETIMP_DMAFTIM1 , PIOCOMP) |
262 * (ATA_IDETIMP_PREPOST1 , DISABLE) |
263 * (ATA_IDETIMP_RDYSEN1 , DISABLE) |
264 * (ATA_IDETIMP_PIOFTIM1 , DISABLE) |
265 * (ATA_IDETIMP_DMAFTIM0 , PIOCOMP) |
266 * (ATA_IDETIMP_PREPOST0 , DISABLE) |
267 * (ATA_IDETIMP_RDYSEN0 , DISABLE) |
268 * (ATA_IDETIMP_PIOFTIM0 , DISABLE)
270 writew(0xB388, base + BK3710_IDETIMP);
273 * Configure SIDETIM Register
274 * (ATA_SIDETIM_RDYSMPS1 ,120NS ) |
275 * (ATA_SIDETIM_RDYRCYS1 ,120NS )
277 writeb(0, base + BK3710_SIDETIM);
280 * UDMACTL Ultra-ATA DMA Control
281 * (ATA_UDMACTL_UDMAP1 , 0 ) |
282 * (ATA_UDMACTL_UDMAP0 , 0 )
285 writew(0, base + BK3710_UDMACTL);
288 * MISCCTL Miscellaneous Conrol Register
289 * (ATA_MISCCTL_RSTMODEP , 1) |
290 * (ATA_MISCCTL_RESETP , 0) |
291 * (ATA_MISCCTL_TIMORIDE , 1)
293 writel(0x201, base + BK3710_MISCCTL);
296 * IORDYTMP IORDY Timer for Primary Register
297 * (ATA_IORDYTMP_IORDYTMP , 0xffff )
299 writel(0xFFFF, base + BK3710_IORDYTMP);
302 * Configure BMISP Register
303 * (ATA_BMISP_DMAEN1 , DISABLE ) |
304 * (ATA_BMISP_DMAEN0 , DISABLE ) |
305 * (ATA_BMISP_IORDYINT , CLEAR) |
306 * (ATA_BMISP_INTRSTAT , CLEAR) |
307 * (ATA_BMISP_DMAERROR , CLEAR)
309 writew(0, base + BK3710_BMISP);
311 palm_bk3710_setpiomode(base, NULL, 0, 600, 0);
312 palm_bk3710_setpiomode(base, NULL, 1, 600, 0);
315 static u8 __devinit palm_bk3710_cable_detect(ide_hwif_t *hwif)
317 return ATA_CBL_PATA80;
320 static int __devinit palm_bk3710_init_dma(ide_hwif_t *hwif,
321 const struct ide_port_info *d)
324 hwif->io_ports.data_addr - IDE_PALM_ATA_PRI_REG_OFFSET;
326 printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name);
328 if (ide_allocate_dma_engine(hwif))
331 ide_setup_dma(hwif, base);
336 static const struct ide_port_ops palm_bk3710_ports_ops = {
337 .set_pio_mode = palm_bk3710_set_pio_mode,
338 .set_dma_mode = palm_bk3710_set_dma_mode,
339 .cable_detect = palm_bk3710_cable_detect,
342 static const struct ide_port_info __devinitdata palm_bk3710_port_info = {
343 .init_dma = palm_bk3710_init_dma,
344 .port_ops = &palm_bk3710_ports_ops,
345 .host_flags = IDE_HFLAG_MMIO,
346 .pio_mask = ATA_PIO4,
347 .udma_mask = ATA_UDMA4, /* (input clk 99MHz) */
348 .mwdma_mask = ATA_MWDMA2,
351 static int __devinit palm_bk3710_probe(struct platform_device *pdev)
354 struct resource *mem, *irq;
359 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
361 clkp = clk_get(NULL, "IDECLK");
367 ide_palm_clk = clk_get_rate(ideclkp)/100000;
368 ide_palm_clk = (10000/ide_palm_clk) + 1;
369 /* Register the IDE interface with Linux ATA Interface */
370 memset(&hw, 0, sizeof(hw));
372 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
374 printk(KERN_ERR "failed to get memory region resource\n");
378 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
380 printk(KERN_ERR "failed to get IRQ resource\n");
384 if (request_mem_region(mem->start, mem->end - mem->start + 1,
385 "palm_bk3710") == NULL) {
386 printk(KERN_ERR "failed to request memory region\n");
390 base = IO_ADDRESS(mem->start);
392 /* Configure the Palm Chip controller */
393 palm_bk3710_chipinit((void __iomem *)base);
395 for (i = 0; i < IDE_NR_PORTS - 2; i++)
396 hw.io_ports_array[i] = base + IDE_PALM_ATA_PRI_REG_OFFSET + i;
397 hw.io_ports.ctl_addr = base + IDE_PALM_ATA_PRI_CTL_OFFSET;
399 hw.chipset = ide_palm3710;
401 hwif = ide_find_port();
407 ide_init_port_data(hwif, i);
408 ide_init_port_hw(hwif, &hw);
411 default_hwif_mmiops(hwif);
415 ide_device_add(idx, &palm_bk3710_port_info);
419 printk(KERN_WARNING "Palm Chip BK3710 IDE Register Fail\n");
423 /* work with hotplug and coldplug */
424 MODULE_ALIAS("platform:palm_bk3710");
426 static struct platform_driver platform_bk_driver = {
428 .name = "palm_bk3710",
429 .owner = THIS_MODULE,
431 .probe = palm_bk3710_probe,
435 static int __init palm_bk3710_init(void)
437 return platform_driver_register(&platform_bk_driver);
440 module_init(palm_bk3710_init);
441 MODULE_LICENSE("GPL");