1/*
  2 *
  3 * Alchemy Semi Pb1000 boards specific pcmcia routines.
  4 *
  5 * Copyright 2002 MontaVista Software Inc.
  6 * Author: MontaVista Software, Inc.
  7 *         	ppopov@mvista.com or source@mvista.com
  8 *
  9 * ########################################################################
 10 *
 11 *  This program is free software; you can distribute it and/or modify it
 12 *  under the terms of the GNU General Public License (Version 2) as
 13 *  published by the Free Software Foundation.
 14 *
 15 *  This program is distributed in the hope it will be useful, but WITHOUT
 16 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 17 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 18 *  for more details.
 19 *
 20 *  You should have received a copy of the GNU General Public License along
 21 *  with this program; if not, write to the Free Software Foundation, Inc.,
 22 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 23 */
 24#include <linux/module.h>
 25#include <linux/init.h>
 26#include <linux/delay.h>
 27#include <linux/ioport.h>
 28#include <linux/kernel.h>
 29#include <linux/timer.h>
 30#include <linux/mm.h>
 31#include <linux/proc_fs.h>
 32#include <linux/types.h>
 33
 34#include <pcmcia/ss.h>
 35#include <pcmcia/cistpl.h>
 36
 37#include <asm/io.h>
 38#include <asm/irq.h>
 39#include <asm/system.h>
 40
 41#include <asm/au1000.h>
 42#include <asm/au1000_pcmcia.h>
 43
 44#define debug(fmt, arg...) do { } while (0)
 45
 46#include <asm/pb1000.h>
 47#define PCMCIA_IRQ AU1000_GPIO_15
 48
 49static int pb1x00_pcmcia_init(struct pcmcia_init *init)
 50{
 51	u16 pcr;
 52	pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
 53
 54	au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
 55	au_sync_delay(100);
 56	au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
 57	au_sync();
 58
 59	pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
 60	pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
 61	au_writel(pcr, PB1000_PCR);
 62	au_sync_delay(20);
 63	  
 64	return PCMCIA_NUM_SOCKS;
 65}
 66
 67static int pb1x00_pcmcia_shutdown(void)
 68{
 69	u16 pcr;
 70	pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
 71	pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
 72	pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
 73	au_writel(pcr, PB1000_PCR);
 74	au_sync_delay(20);
 75	return 0;
 76}
 77
 78static int 
 79pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 80{
 81	u32 inserted0, inserted1;
 82	u16 vs0, vs1;
 83
 84	vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 85	inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 86	inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 87	vs0 = (vs0 >> 4) & 0x3;
 88	vs1 = (vs1 >> 12) & 0x3;
 89
 90	state->ready = 0;
 91	state->vs_Xv = 0;
 92	state->vs_3v = 0;
 93	state->detect = 0;
 94
 95	if (sock == 0) {
 96		if (inserted0) {
 97			switch (vs0) {
 98				case 0:
 99				case 2:
100					state->vs_3v=1;
101					break;
102				case 3: /* 5V */
103					break;
104				default:
105					/* return without setting 'detect' */
106					printk(KERN_ERR "pb1x00 bad VS (%d)\n",
107							vs0);
108					return 0;
109			}
110			state->detect = 1;
111		}
112	}
113	else  {
114		if (inserted1) {
115			switch (vs1) {
116				case 0:
117				case 2:
118					state->vs_3v=1;
119					break;
120				case 3: /* 5V */
121					break;
122				default:
123					/* return without setting 'detect' */
124					printk(KERN_ERR "pb1x00 bad VS (%d)\n",
125							vs1);
126					return 0;
127			}
128			state->detect = 1;
129		}
130	}
131
132	if (state->detect) {
133		state->ready = 1;
134	}
135
136	state->bvd1=1;
137	state->bvd2=1;
138	state->wrprot=0; 
139	return 1;
140}
141
142
143static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
144{
145
146	if(info->sock > PCMCIA_MAX_SOCK) return -1;
147
148	/*
149	 * Even in the case of the Pb1000, both sockets are connected
150	 * to the same irq line.
151	 */
152	info->irq = PCMCIA_IRQ;
153
154	return 0;
155}
156
157
158static int 
159pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
160{
161	u16 pcr;
162
163	if(configure->sock > PCMCIA_MAX_SOCK) return -1;
164
165	pcr = au_readl(PB1000_PCR);
166
167	if (configure->sock == 0) {
168		pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 | 
169				PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
170	}
171	else  {
172		pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 | 
173				PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
174	}
175
176	pcr &= ~PCR_SLOT_0_RST;
177	debug("Vcc %dV Vpp %dV, pcr %x\n", 
178			configure->vcc, configure->vpp, pcr);
179	switch(configure->vcc){
180		case 0:  /* Vcc 0 */
181			switch(configure->vpp) {
182				case 0:
183					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
184							configure->sock);
185					break;
186				case 12:
187					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
188							configure->sock);
189					break;
190				case 50:
191					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
192							configure->sock);
193					break;
194				case 33:
195					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
196							configure->sock);
197					break;
198				default:
199					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
200							configure->sock);
201					printk("%s: bad Vcc/Vpp (%d:%d)\n", 
202							__func__,
203							configure->vcc, 
204							configure->vpp);
205					break;
206			}
207			break;
208		case 50: /* Vcc 5V */
209			switch(configure->vpp) {
210				case 0:
211					pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
212							configure->sock);
213					break;
214				case 50:
215					pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
216							configure->sock);
217					break;
218				case 12:
219					pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
220							configure->sock);
221					break;
222				case 33:
223					pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
224							configure->sock);
225					break;
226				default:
227					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
228							configure->sock);
229					printk("%s: bad Vcc/Vpp (%d:%d)\n", 
230							__func__,
231							configure->vcc, 
232							configure->vpp);
233					break;
234			}
235			break;
236		case 33: /* Vcc 3.3V */
237			switch(configure->vpp) {
238				case 0:
239					pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
240							configure->sock);
241					break;
242				case 50:
243					pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
244							configure->sock);
245					break;
246				case 12:
247					pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
248							configure->sock);
249					break;
250				case 33:
251					pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
252							configure->sock);
253					break;
254				default:
255					pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
256							configure->sock);
257					printk("%s: bad Vcc/Vpp (%d:%d)\n", 
258							__func__,
259							configure->vcc, 
260							configure->vpp);
261					break;
262			}
263			break;
264		default: /* what's this ? */
265			pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
266			printk(KERN_ERR "%s: bad Vcc %d\n", 
267					__func__, configure->vcc);
268			break;
269	}
270
271	if (configure->sock == 0) {
272	pcr &= ~(PCR_SLOT_0_RST);
273		if (configure->reset)
274		pcr |= PCR_SLOT_0_RST;
275	}
276	else {
277		pcr &= ~(PCR_SLOT_1_RST);
278		if (configure->reset)
279			pcr |= PCR_SLOT_1_RST;
280	}
281	au_writel(pcr, PB1000_PCR);
282	au_sync_delay(300);
283
284	return 0;
285}
286
287
288struct pcmcia_low_level pb1x00_pcmcia_ops = { 
289	pb1x00_pcmcia_init,
290	pb1x00_pcmcia_shutdown,
291	pb1x00_pcmcia_socket_state,
292	pb1x00_pcmcia_get_irq_info,
293	pb1x00_pcmcia_configure_socket
294};