1/*
  2 * drivers/pcmcia/sa1100_simpad.c
  3 *
  4 * PCMCIA implementation routines for simpad
  5 *
  6 */
  7#include <linux/module.h>
  8#include <linux/kernel.h>
  9#include <linux/device.h>
 10#include <linux/init.h>
 11
 12#include <mach/hardware.h>
 13#include <asm/mach-types.h>
 14#include <asm/irq.h>
 15#include <mach/simpad.h>
 16#include "sa1100_generic.h"
 17 
 18extern long get_cs3_shadow(void);
 19extern void set_cs3_bit(int value); 
 20extern void clear_cs3_bit(int value);
 21
 22static struct pcmcia_irqs irqs[] = {
 23	{ 1, IRQ_GPIO_CF_CD, "CF_CD" },
 24};
 25
 26static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 27{
 28
 29	clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
 30
 31	skt->socket.pci_irq = IRQ_GPIO_CF_IRQ;
 32
 33	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
 34}
 35
 36static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
 37{
 38	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
 39
 40	/* Disable CF bus: */
 41	//set_cs3_bit(PCMCIA_BUFF_DIS);
 42	clear_cs3_bit(PCMCIA_RESET);       
 43}
 44
 45static void
 46simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 47			   struct pcmcia_state *state)
 48{
 49	unsigned long levels = GPLR;
 50	long cs3reg = get_cs3_shadow();
 51
 52	state->detect=((levels & GPIO_CF_CD)==0)?1:0;
 53	state->ready=(levels & GPIO_CF_IRQ)?1:0;
 54	state->bvd1=1; /* Not available on Simpad. */
 55	state->bvd2=1; /* Not available on Simpad. */
 56	state->wrprot=0; /* Not available on Simpad. */
 57  
 58	if((cs3reg & 0x0c) == 0x0c) {
 59		state->vs_3v=0;
 60		state->vs_Xv=0;
 61	} else {
 62		state->vs_3v=1;
 63		state->vs_Xv=0;
 64	}
 65}
 66
 67static int
 68simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 69			       const socket_state_t *state)
 70{
 71	unsigned long flags;
 72
 73	local_irq_save(flags);
 74
 75	/* Murphy: see table of MIC2562a-1 */
 76	switch (state->Vcc) {
 77	case 0:
 78		clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
 79		break;
 80
 81	case 33:  
 82		clear_cs3_bit(VCC_3V_EN|EN1);
 83		set_cs3_bit(VCC_5V_EN|EN0);
 84		break;
 85
 86	case 50:
 87		clear_cs3_bit(VCC_5V_EN|EN1);
 88		set_cs3_bit(VCC_3V_EN|EN0);
 89		break;
 90
 91	default:
 92		printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
 93			__func__, state->Vcc);
 94		clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
 95		local_irq_restore(flags);
 96		return -1;
 97	}
 98
 99
100	local_irq_restore(flags);
101
102	return 0;
103}
104
105static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
106{
107	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
108}
109
110static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
111{
112	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
113	set_cs3_bit(PCMCIA_RESET);
114}
115
116static struct pcmcia_low_level simpad_pcmcia_ops = { 
117	.owner			= THIS_MODULE,
118	.hw_init		= simpad_pcmcia_hw_init,
119	.hw_shutdown		= simpad_pcmcia_hw_shutdown,
120	.socket_state		= simpad_pcmcia_socket_state,
121	.configure_socket	= simpad_pcmcia_configure_socket,
122	.socket_init		= simpad_pcmcia_socket_init,
123	.socket_suspend		= simpad_pcmcia_socket_suspend,
124};
125
126int __devinit pcmcia_simpad_init(struct device *dev)
127{
128	int ret = -ENODEV;
129
130	if (machine_is_simpad())
131		ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
132
133	return ret;
134}