1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Sharp SL-C7xx Series PCMCIA routines
4 *
5 * Copyright (c) 2004-2005 Richard Purdie
6 *
7 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/errno.h>
14#include <linux/interrupt.h>
15#include <linux/platform_device.h>
16
17#include <asm/mach-types.h>
18#include <asm/irq.h>
19#include <asm/hardware/scoop.h>
20
21#include <pcmcia/soc_common.h>
22
23#define	NO_KEEP_VS 0x0001
24#define SCOOP_DEV platform_scoop_config->devs
25
26static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
27{
28	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
29
30	reset_scoop(scoopdev->dev);
31
32	/* Shared power controls need to be handled carefully */
33	if (platform_scoop_config->power_ctrl)
34		platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
35	else
36		write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
37
38	scoopdev->keep_vs = NO_KEEP_VS;
39	scoopdev->keep_rd = 0;
40}
41
42static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
43{
44	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
45		skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
46		skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
47	}
48
49	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;
50
51	return 0;
52}
53
54static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
55				    struct pcmcia_state *state)
56{
57	unsigned short cpr, csr;
58	struct device *scoop = SCOOP_DEV[skt->nr].dev;
59
60	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
61
62	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
63	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
64	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
65	csr = read_scoop_reg(scoop, SCOOP_CSR);
66	if (csr & 0x0004) {
67		/* card eject */
68		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
69		SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
70	}
71	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
72		/* keep vs1,vs2 */
73		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
74		csr |= SCOOP_DEV[skt->nr].keep_vs;
75	}
76	else if (cpr & 0x0003) {
77		/* power on */
78		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
79		SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
80	}
81	else {
82		/* card detect */
83	        if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
84	                write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
85	        } else {
86		        write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
87	        }
88	}
89
90	state->detect = (csr & 0x0004) ? 0 : 1;
91	state->ready  = (csr & 0x0002) ? 1 : 0;
92	state->bvd1   = (csr & 0x0010) ? 1 : 0;
93	state->bvd2   = (csr & 0x0020) ? 1 : 0;
94	state->wrprot = (csr & 0x0008) ? 1 : 0;
95	state->vs_3v  = (csr & 0x0040) ? 0 : 1;
96	state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
97
98	if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
99		printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
100	}
101}
102
103
104static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
105				       const socket_state_t *state)
106{
107	unsigned long flags;
108	struct device *scoop = SCOOP_DEV[skt->nr].dev;
109
110	unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
111
112	switch (state->Vcc) {
113	case	0:  	break;
114	case 	33: 	break;
115	case	50: 	break;
116	default:
117		 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
118		 return -1;
119	}
120
121	if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
122		printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
123		return -1;
124	}
125
126	local_irq_save(flags);
127
128	nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
129	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
130	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
131	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
132
133	if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
134	        ncpr |= (state->Vcc == 33) ? 0x0002 :
135		        (state->Vcc == 50) ? 0x0002 : 0;
136	} else {
137	        ncpr |= (state->Vcc == 33) ? 0x0001 :
138		        (state->Vcc == 50) ? 0x0002 : 0;
139	}
140	nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
141	ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
142	nccr |= (state->flags&SS_RESET)? 0x0080: 0;
143	nimr |=	((skt->status&SS_DETECT) ? 0x0004 : 0)|
144			((skt->status&SS_READY)  ? 0x0002 : 0)|
145			((skt->status&SS_BATDEAD)? 0x0010 : 0)|
146			((skt->status&SS_BATWARN)? 0x0020 : 0)|
147			((skt->status&SS_STSCHG) ? 0x0010 : 0)|
148			((skt->status&SS_WRPROT) ? 0x0008 : 0);
149
150	if (!(ncpr & 0x0003)) {
151		SCOOP_DEV[skt->nr].keep_rd = 0;
152	} else if (!SCOOP_DEV[skt->nr].keep_rd) {
153		if (nccr & 0x0080)
154			SCOOP_DEV[skt->nr].keep_rd = 1;
155		else
156			nccr |= 0x0080;
157	}
158
159	if (mcr != nmcr)
160		write_scoop_reg(scoop, SCOOP_MCR, nmcr);
161	if (cpr != ncpr) {
162		if (platform_scoop_config->power_ctrl)
163			platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
164		else
165		        write_scoop_reg(scoop, SCOOP_CPR, ncpr);
166	}
167	if (ccr != nccr)
168		write_scoop_reg(scoop, SCOOP_CCR, nccr);
169	if (imr != nimr)
170		write_scoop_reg(scoop, SCOOP_IMR, nimr);
171
172	local_irq_restore(flags);
173
174	return 0;
175}
176
177static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
178{
179	sharpsl_pcmcia_init_reset(skt);
180
181	/* Enable interrupt */
182	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
183	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
184	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
185}
186
187static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
188{
189	sharpsl_pcmcia_init_reset(skt);
190}
191
192static struct pcmcia_low_level sharpsl_pcmcia_ops = {
193	.owner                  = THIS_MODULE,
194	.hw_init                = sharpsl_pcmcia_hw_init,
195	.socket_state           = sharpsl_pcmcia_socket_state,
196	.configure_socket       = sharpsl_pcmcia_configure_socket,
197	.socket_init            = sharpsl_pcmcia_socket_init,
198	.socket_suspend         = sharpsl_pcmcia_socket_suspend,
199	.first                  = 0,
200	.nr                     = 0,
201};
202
203#ifdef CONFIG_SA1100_COLLIE
204#include "sa11xx_base.h"
205
206int pcmcia_collie_init(struct device *dev)
207{
208       int ret = -ENODEV;
209
210       if (machine_is_collie())
211               ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
212
213       return ret;
214}
215
216#else
217
218static struct platform_device *sharpsl_pcmcia_device;
219
220static int __init sharpsl_pcmcia_init(void)
221{
222	int ret;
223
224	if (!platform_scoop_config)
225		return -ENODEV;
226
227	sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
228	sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
229
230	if (!sharpsl_pcmcia_device)
231		return -ENOMEM;
232
233	ret = platform_device_add_data(sharpsl_pcmcia_device,
234			&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
235	if (ret == 0) {
236		sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
237		ret = platform_device_add(sharpsl_pcmcia_device);
238	}
239
240	if (ret)
241		platform_device_put(sharpsl_pcmcia_device);
242
243	return ret;
244}
245
246static void __exit sharpsl_pcmcia_exit(void)
247{
248	platform_device_unregister(sharpsl_pcmcia_device);
249}
250
251fs_initcall(sharpsl_pcmcia_init);
252module_exit(sharpsl_pcmcia_exit);
253#endif
254
255MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
256MODULE_LICENSE("GPL");
257MODULE_ALIAS("platform:pxa2xx-pcmcia");
258