1/*
2 * Sharp SL-C7xx Series PCMCIA routines
3 *
4 * Copyright (c) 2004-2005 Richard Purdie
5 *
6 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/interrupt.h>
19#include <linux/platform_device.h>
20
21#include <asm/mach-types.h>
22#include <mach/hardware.h>
23#include <asm/irq.h>
24#include <asm/hardware/scoop.h>
25
26#include "soc_common.h"
27
28#define	NO_KEEP_VS 0x0001
29#define SCOOP_DEV platform_scoop_config->devs
30
31static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
32{
33	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
34
35	reset_scoop(scoopdev->dev);
36
37	/* Shared power controls need to be handled carefully */
38	if (platform_scoop_config->power_ctrl)
39		platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
40	else
41		write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
42
43	scoopdev->keep_vs = NO_KEEP_VS;
44	scoopdev->keep_rd = 0;
45}
46
47static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
48{
49	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
50		skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
51		skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
52	}
53
54	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;
55
56	return 0;
57}
58
59static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
60				    struct pcmcia_state *state)
61{
62	unsigned short cpr, csr;
63	struct device *scoop = SCOOP_DEV[skt->nr].dev;
64
65	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
66
67	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
68	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
69	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
70	csr = read_scoop_reg(scoop, SCOOP_CSR);
71	if (csr & 0x0004) {
72		/* card eject */
73		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
74		SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
75	}
76	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
77		/* keep vs1,vs2 */
78		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
79		csr |= SCOOP_DEV[skt->nr].keep_vs;
80	}
81	else if (cpr & 0x0003) {
82		/* power on */
83		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
84		SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
85	}
86	else {
87		/* card detect */
88	        if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
89	                write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
90	        } else {
91		        write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
92	        }
93	}
94
95	state->detect = (csr & 0x0004) ? 0 : 1;
96	state->ready  = (csr & 0x0002) ? 1 : 0;
97	state->bvd1   = (csr & 0x0010) ? 1 : 0;
98	state->bvd2   = (csr & 0x0020) ? 1 : 0;
99	state->wrprot = (csr & 0x0008) ? 1 : 0;
100	state->vs_3v  = (csr & 0x0040) ? 0 : 1;
101	state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
102
103	if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
104		printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
105	}
106}
107
108
109static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
110				       const socket_state_t *state)
111{
112	unsigned long flags;
113	struct device *scoop = SCOOP_DEV[skt->nr].dev;
114
115	unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
116
117	switch (state->Vcc) {
118	case	0:  	break;
119	case 	33: 	break;
120	case	50: 	break;
121	default:
122		 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
123		 return -1;
124	}
125
126	if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
127		printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
128		return -1;
129	}
130
131	local_irq_save(flags);
132
133	nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
134	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
135	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
136	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
137
138	if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
139	        ncpr |= (state->Vcc == 33) ? 0x0002 :
140		        (state->Vcc == 50) ? 0x0002 : 0;
141	} else {
142	        ncpr |= (state->Vcc == 33) ? 0x0001 :
143		        (state->Vcc == 50) ? 0x0002 : 0;
144	}
145	nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
146	ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
147	nccr |= (state->flags&SS_RESET)? 0x0080: 0;
148	nimr |=	((skt->status&SS_DETECT) ? 0x0004 : 0)|
149			((skt->status&SS_READY)  ? 0x0002 : 0)|
150			((skt->status&SS_BATDEAD)? 0x0010 : 0)|
151			((skt->status&SS_BATWARN)? 0x0020 : 0)|
152			((skt->status&SS_STSCHG) ? 0x0010 : 0)|
153			((skt->status&SS_WRPROT) ? 0x0008 : 0);
154
155	if (!(ncpr & 0x0003)) {
156		SCOOP_DEV[skt->nr].keep_rd = 0;
157	} else if (!SCOOP_DEV[skt->nr].keep_rd) {
158		if (nccr & 0x0080)
159			SCOOP_DEV[skt->nr].keep_rd = 1;
160		else
161			nccr |= 0x0080;
162	}
163
164	if (mcr != nmcr)
165		write_scoop_reg(scoop, SCOOP_MCR, nmcr);
166	if (cpr != ncpr) {
167		if (platform_scoop_config->power_ctrl)
168			platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
169		else
170		        write_scoop_reg(scoop, SCOOP_CPR, ncpr);
171	}
172	if (ccr != nccr)
173		write_scoop_reg(scoop, SCOOP_CCR, nccr);
174	if (imr != nimr)
175		write_scoop_reg(scoop, SCOOP_IMR, nimr);
176
177	local_irq_restore(flags);
178
179	return 0;
180}
181
182static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
183{
184	sharpsl_pcmcia_init_reset(skt);
185
186	/* Enable interrupt */
187	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
188	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
189	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
190}
191
192static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
193{
194	sharpsl_pcmcia_init_reset(skt);
195}
196
197static struct pcmcia_low_level sharpsl_pcmcia_ops = {
198	.owner                  = THIS_MODULE,
199	.hw_init                = sharpsl_pcmcia_hw_init,
200	.socket_state           = sharpsl_pcmcia_socket_state,
201	.configure_socket       = sharpsl_pcmcia_configure_socket,
202	.socket_init            = sharpsl_pcmcia_socket_init,
203	.socket_suspend         = sharpsl_pcmcia_socket_suspend,
204	.first                  = 0,
205	.nr                     = 0,
206};
207
208#ifdef CONFIG_SA1100_COLLIE
209#include "sa11xx_base.h"
210
211int pcmcia_collie_init(struct device *dev)
212{
213       int ret = -ENODEV;
214
215       if (machine_is_collie())
216               ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
217
218       return ret;
219}
220
221#else
222
223static struct platform_device *sharpsl_pcmcia_device;
224
225static int __init sharpsl_pcmcia_init(void)
226{
227	int ret;
228
229	if (!platform_scoop_config)
230		return -ENODEV;
231
232	sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
233	sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
234
235	if (!sharpsl_pcmcia_device)
236		return -ENOMEM;
237
238	ret = platform_device_add_data(sharpsl_pcmcia_device,
239			&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
240	if (ret == 0) {
241		sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
242		ret = platform_device_add(sharpsl_pcmcia_device);
243	}
244
245	if (ret)
246		platform_device_put(sharpsl_pcmcia_device);
247
248	return ret;
249}
250
251static void __exit sharpsl_pcmcia_exit(void)
252{
253	platform_device_unregister(sharpsl_pcmcia_device);
254}
255
256fs_initcall(sharpsl_pcmcia_init);
257module_exit(sharpsl_pcmcia_exit);
258#endif
259
260MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
261MODULE_LICENSE("GPL");
262MODULE_ALIAS("platform:pxa2xx-pcmcia");
263