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