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/drivers/ide/legacy/buddha.c

https://bitbucket.org/evzijst/gittest
C | 235 lines | 149 code | 40 blank | 46 comment | 27 complexity | 22569f0c6c1ceb5486656a0edcc05d80 MD5 | raw file
  1/*
  2 *  linux/drivers/ide/legacy/buddha.c -- Amiga Buddha, Catweasel and X-Surf IDE Driver
  3 *
  4 *	Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
  5 *
  6 *  This driver was written based on the specifications in README.buddha and
  7 *  the X-Surf info from Inside_XSurf.txt available at
  8 *  http://www.jschoenfeld.com
  9 *
 10 *  This file is subject to the terms and conditions of the GNU General Public
 11 *  License.  See the file COPYING in the main directory of this archive for
 12 *  more details.
 13 *
 14 *  TODO:
 15 *    - test it :-)
 16 *    - tune the timings using the speed-register
 17 */
 18
 19#include <linux/types.h>
 20#include <linux/mm.h>
 21#include <linux/interrupt.h>
 22#include <linux/blkdev.h>
 23#include <linux/hdreg.h>
 24#include <linux/zorro.h>
 25#include <linux/ide.h>
 26#include <linux/init.h>
 27
 28#include <asm/amigahw.h>
 29#include <asm/amigaints.h>
 30
 31
 32    /*
 33     *  The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
 34     */
 35
 36#define BUDDHA_NUM_HWIFS	2
 37#define CATWEASEL_NUM_HWIFS	3
 38#define XSURF_NUM_HWIFS         2
 39
 40    /*
 41     *  Bases of the IDE interfaces (relative to the board address)
 42     */
 43
 44#define BUDDHA_BASE1	0x800
 45#define BUDDHA_BASE2	0xa00
 46#define BUDDHA_BASE3	0xc00
 47
 48#define XSURF_BASE1     0xb000 /* 2.5" Interface */
 49#define XSURF_BASE2     0xd000 /* 3.5" Interface */
 50
 51static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
 52    BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
 53};
 54
 55static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
 56     XSURF_BASE1, XSURF_BASE2
 57};
 58
 59
 60    /*
 61     *  Offsets from one of the above bases
 62     */
 63
 64#define BUDDHA_DATA	0x00
 65#define BUDDHA_ERROR	0x06		/* see err-bits */
 66#define BUDDHA_NSECTOR	0x0a		/* nr of sectors to read/write */
 67#define BUDDHA_SECTOR	0x0e		/* starting sector */
 68#define BUDDHA_LCYL	0x12		/* starting cylinder */
 69#define BUDDHA_HCYL	0x16		/* high byte of starting cyl */
 70#define BUDDHA_SELECT	0x1a		/* 101dhhhh , d=drive, hhhh=head */
 71#define BUDDHA_STATUS	0x1e		/* see status-bits */
 72#define BUDDHA_CONTROL	0x11a
 73#define XSURF_CONTROL   -1              /* X-Surf has no CS1* (Control/AltStat) */
 74
 75static int buddha_offsets[IDE_NR_PORTS] __initdata = {
 76    BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
 77    BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL, -1
 78};
 79
 80static int xsurf_offsets[IDE_NR_PORTS] __initdata = {
 81    BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
 82    BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, XSURF_CONTROL, -1
 83};
 84
 85    /*
 86     *  Other registers
 87     */
 88
 89#define BUDDHA_IRQ1	0xf00		/* MSB = 1, Harddisk is source of */
 90#define BUDDHA_IRQ2	0xf40		/* interrupt */
 91#define BUDDHA_IRQ3	0xf80
 92
 93#define XSURF_IRQ1      0x7e
 94#define XSURF_IRQ2      0x7e
 95
 96static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
 97    BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
 98};
 99
100static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
101    XSURF_IRQ1, XSURF_IRQ2
102};
103
104#define BUDDHA_IRQ_MR	0xfc0		/* master interrupt enable */
105
106
107    /*
108     *  Board information
109     */
110
111typedef enum BuddhaType_Enum {
112    BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
113} BuddhaType;
114
115
116    /*
117     *  Check and acknowledge the interrupt status
118     */
119
120static int buddha_ack_intr(ide_hwif_t *hwif)
121{
122    unsigned char ch;
123
124    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
125    if (!(ch & 0x80))
126	    return 0;
127    return 1;
128}
129
130static int xsurf_ack_intr(ide_hwif_t *hwif)
131{
132    unsigned char ch;
133
134    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
135    /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
136    z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]); 
137    if (!(ch & 0x80))
138	    return 0;
139    return 1;
140}
141
142    /*
143     *  Probe for a Buddha or Catweasel IDE interface
144     */
145
146void __init buddha_init(void)
147{
148	hw_regs_t hw;
149	ide_hwif_t *hwif;
150	int i, index;
151
152	struct zorro_dev *z = NULL;
153	u_long buddha_board = 0;
154	BuddhaType type;
155	int buddha_num_hwifs;
156
157	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
158		unsigned long board;
159		if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
160			buddha_num_hwifs = BUDDHA_NUM_HWIFS;
161			type=BOARD_BUDDHA;
162		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
163			buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
164			type=BOARD_CATWEASEL;
165		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
166			buddha_num_hwifs = XSURF_NUM_HWIFS;
167			type=BOARD_XSURF;
168		} else 
169			continue;
170		
171		board = z->resource.start;
172
173/*
174 * FIXME: we now have selectable mmio v/s iomio transports.
175 */
176
177		if(type != BOARD_XSURF) {
178			if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
179				continue;
180		} else {
181			if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
182				continue;
183			if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
184				goto fail_base2;
185			if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
186				release_mem_region(board+XSURF_BASE2, 0x1000);
187fail_base2:
188				release_mem_region(board+XSURF_BASE1, 0x1000);
189				continue;
190			}
191		}	  
192		buddha_board = ZTWO_VADDR(board);
193		
194		/* write to BUDDHA_IRQ_MR to enable the board IRQ */
195		/* X-Surf doesn't have this.  IRQs are always on */
196		if (type != BOARD_XSURF)
197			z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
198		
199		for(i=0;i<buddha_num_hwifs;i++) {
200			if(type != BOARD_XSURF) {
201				ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
202						buddha_offsets, 0,
203						(buddha_board+buddha_irqports[i]),
204						buddha_ack_intr,
205//						budda_iops,
206						IRQ_AMIGA_PORTS);
207			} else {
208				ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
209						xsurf_offsets, 0,
210						(buddha_board+xsurf_irqports[i]),
211						xsurf_ack_intr,
212//						xsurf_iops,
213						IRQ_AMIGA_PORTS);
214			}	
215			
216			index = ide_register_hw(&hw, &hwif);
217			if (index != -1) {
218				hwif->mmio = 2;
219				printk("ide%d: ", index);
220				switch(type) {
221				case BOARD_BUDDHA:
222					printk("Buddha");
223					break;
224				case BOARD_CATWEASEL:
225					printk("Catweasel");
226					break;
227				case BOARD_XSURF:
228					printk("X-Surf");
229					break;
230				}
231				printk(" IDE interface\n");	    
232			}		      
233		}
234	}
235}