1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
  4 *
  5 * TRIZEPS PCMCIA specific routines.
  6 *
  7 * Author:	Jürgen Schindele
  8 * Created:	20 02, 2006
  9 * Copyright:	Jürgen Schindele
 10 */
 11
 12#include <linux/module.h>
 13#include <linux/init.h>
 14#include <linux/kernel.h>
 15#include <linux/gpio.h>
 16#include <linux/interrupt.h>
 17#include <linux/platform_device.h>
 18
 19#include <asm/mach-types.h>
 20#include <asm/irq.h>
 21
 22#include <mach/pxa2xx-regs.h>
 23#include <mach/trizeps4.h>
 24
 25#include "soc_common.h"
 26
 27extern void board_pcmcia_power(int power);
 28
 29static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 30{
 31	/* we dont have voltage/card/ready detection
 32	 * so we dont need interrupts for it
 33	 */
 34	switch (skt->nr) {
 35	case 0:
 36		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
 37		skt->stat[SOC_STAT_CD].name = "cs0_cd";
 38		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
 39		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
 40		break;
 41	default:
 42		break;
 43	}
 44	/* release the reset of this card */
 45	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
 46
 47	return 0;
 48}
 49
 50static unsigned long trizeps_pcmcia_status[2];
 51
 52static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 53				struct pcmcia_state *state)
 54{
 55	unsigned short status = 0, change;
 56	status = CFSR_readw();
 57	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
 58				ConXS_CFSR_BVD_MASK;
 59	if (change) {
 60		trizeps_pcmcia_status[skt->nr] = status;
 61		if (status & ConXS_CFSR_BVD1) {
 62			/* enable_irq empty */
 63		} else {
 64			/* disable_irq empty */
 65		}
 66	}
 67
 68	switch (skt->nr) {
 69	case 0:
 70		/* just fill in fix states */
 71		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
 72		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
 73		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
 74		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
 75		break;
 76
 77#ifndef CONFIG_MACH_TRIZEPS_CONXS
 78	/* on ConXS we only have one slot. Second is inactive */
 79	case 1:
 80		state->detect = 0;
 81		state->ready  = 0;
 82		state->bvd1   = 0;
 83		state->bvd2   = 0;
 84		state->vs_3v  = 0;
 85		state->vs_Xv  = 0;
 86		break;
 87
 88#endif
 89	}
 90}
 91
 92static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 93				const socket_state_t *state)
 94{
 95	int ret = 0;
 96	unsigned short power = 0;
 97
 98	/* we do nothing here just check a bit */
 99	switch (state->Vcc) {
100	case 0:  power &= 0xfc; break;
101	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
102	case 50:
103		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
104		break;
105	default:
106		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
107		ret = -1;
108	}
109
110	switch (state->Vpp) {
111	case 0:  power &= 0xf3; break;
112	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
113	case 120:
114		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
115		break;
116	default:
117		if (state->Vpp != state->Vcc) {
118			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
119			ret = -1;
120		}
121	}
122
123	switch (skt->nr) {
124	case 0:			 /* we only have 3.3V */
125		board_pcmcia_power(power);
126		break;
127
128#ifndef CONFIG_MACH_TRIZEPS_CONXS
129	/* on ConXS we only have one slot. Second is inactive */
130	case 1:
131#endif
132	default:
133		break;
134	}
135
136	return ret;
137}
138
139static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
140{
141	/* default is on */
142	board_pcmcia_power(0x9);
143}
144
145static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
146{
147	board_pcmcia_power(0x0);
148}
149
150static struct pcmcia_low_level trizeps_pcmcia_ops = {
151	.owner			= THIS_MODULE,
152	.hw_init		= trizeps_pcmcia_hw_init,
153	.socket_state		= trizeps_pcmcia_socket_state,
154	.configure_socket	= trizeps_pcmcia_configure_socket,
155	.socket_init		= trizeps_pcmcia_socket_init,
156	.socket_suspend		= trizeps_pcmcia_socket_suspend,
157#ifdef CONFIG_MACH_TRIZEPS_CONXS
158	.nr			= 1,
159#else
160	.nr			= 2,
161#endif
162	.first			= 0,
163};
164
165static struct platform_device *trizeps_pcmcia_device;
166
167static int __init trizeps_pcmcia_init(void)
168{
169	int ret;
170
171	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
172		return -ENODEV;
173
174	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
175	if (!trizeps_pcmcia_device)
176		return -ENOMEM;
177
178	ret = platform_device_add_data(trizeps_pcmcia_device,
179			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
180
181	if (ret == 0)
182		ret = platform_device_add(trizeps_pcmcia_device);
183
184	if (ret)
185		platform_device_put(trizeps_pcmcia_device);
186
187	return ret;
188}
189
190static void __exit trizeps_pcmcia_exit(void)
191{
192	platform_device_unregister(trizeps_pcmcia_device);
193}
194
195fs_initcall(trizeps_pcmcia_init);
196module_exit(trizeps_pcmcia_exit);
197
198MODULE_LICENSE("GPL");
199MODULE_AUTHOR("Juergen Schindele");
200MODULE_ALIAS("platform:pxa2xx-pcmcia");