[linux-2.6-block.git] / drivers / pcmcia / sa1100_neponset.c

/*
 * linux/drivers/pcmcia/sa1100_neponset.c
 *
 * Neponset PCMCIA specific routines
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>

#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/arch/neponset.h>
#include <asm/hardware/sa1111.h>

#include "sa1111_generic.h"

/*
 * Neponset uses the Maxim MAX1600, with the following connections:
 *
 *   MAX1600      Neponset
 *
 *    A0VCC        SA-1111 GPIO A<1>
 *    A1VCC        SA-1111 GPIO A<0>
 *    A0VPP        CPLD NCR A0VPP
 *    A1VPP        CPLD NCR A1VPP
 *    B0VCC        SA-1111 GPIO A<2>
 *    B1VCC        SA-1111 GPIO A<3>
 *    B0VPP        ground (slot B is CF)
 *    B1VPP        ground (slot B is CF)
 *
 *     VX          VCC (5V)
 *     VY          VCC3_3 (3.3V)
 *     12INA       12V
 *     12INB       ground (slot B is CF)
 *
 * The MAX1600 CODE pin is tied to ground, placing the device in 
 * "Standard Intel code" mode. Refer to the Maxim data sheet for
 * the corresponding truth table.
 */

static int
neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
	unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set;
	int ret;

	switch (skt->nr) {
	case 0:
		pa_dwr_mask = GPIO_A0 | GPIO_A1;
		ncr_mask = NCR_A0VPP | NCR_A1VPP;

		if (state->Vpp == 0)
			ncr_set = 0;
		else if (state->Vpp == 120)
			ncr_set = NCR_A1VPP;
		else if (state->Vpp == state->Vcc)
			ncr_set = NCR_A0VPP;
		else {
			printk(KERN_ERR "%s(): unrecognized VPP %u\n",
			       __FUNCTION__, state->Vpp);
			return -1;
		}
		break;

	case 1:
		pa_dwr_mask = GPIO_A2 | GPIO_A3;
		ncr_mask = 0;
		ncr_set = 0;

		if (state->Vpp != state->Vcc && state->Vpp != 0) {
			printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
			       __FUNCTION__, state->Vpp);
			return -1;
		}
		break;

	default:
		return -1;
	}

	/*
	 * pa_dwr_set is the mask for selecting Vcc on both sockets.
	 * pa_dwr_mask selects which bits (and therefore socket) we change.
	 */
	switch (state->Vcc) {
	default:
	case 0:  pa_dwr_set = 0;		break;
	case 33: pa_dwr_set = GPIO_A1|GPIO_A2;	break;
	case 50: pa_dwr_set = GPIO_A0|GPIO_A3;	break;
	}

	ret = sa1111_pcmcia_configure_socket(skt, state);
	if (ret == 0) {
		unsigned long flags;

		local_irq_save(flags);
		NCR_0 = (NCR_0 & ~ncr_mask) | ncr_set;

		local_irq_restore(flags);
		sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
	}

	return 0;
}

static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
	if (skt->nr == 0)
		NCR_0 &= ~(NCR_A0VPP | NCR_A1VPP);

	sa1111_pcmcia_socket_init(skt);
}

static struct pcmcia_low_level neponset_pcmcia_ops = {
	.owner			= THIS_MODULE,
	.hw_init		= sa1111_pcmcia_hw_init,
	.hw_shutdown		= sa1111_pcmcia_hw_shutdown,
	.socket_state		= sa1111_pcmcia_socket_state,
	.configure_socket	= neponset_pcmcia_configure_socket,
	.socket_init		= neponset_pcmcia_socket_init,
	.socket_suspend 	= sa1111_pcmcia_socket_suspend,
};

int __init pcmcia_neponset_init(struct sa1111_dev *sadev)
{
	int ret = -ENODEV;

	if (machine_is_assabet()) {
		/*
		 * Set GPIO_A<3:0> to be outputs for the MAX1600,
		 * and switch to standby mode.
		 */
		sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
		sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
		sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
		ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2);
	}

	return ret;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/pcmcia/sa1100_neponset.c
	3	*
	4	* Neponset PCMCIA specific routines
	5	*/
	6	#include <linux/module.h>
	7	#include <linux/kernel.h>
1da177e4 LT	8	#include <linux/device.h>
	9	#include <linux/errno.h>
	10	#include <linux/init.h>
	11
	12	#include <asm/hardware.h>
	13	#include <asm/mach-types.h>
	14	#include <asm/arch/neponset.h>
	15	#include <asm/hardware/sa1111.h>
	16
	17	#include "sa1111_generic.h"
	18
	19	/*
	20	* Neponset uses the Maxim MAX1600, with the following connections:
	21	*
	22	* MAX1600 Neponset
	23	*
	24	* A0VCC SA-1111 GPIO A<1>
	25	* A1VCC SA-1111 GPIO A<0>
	26	* A0VPP CPLD NCR A0VPP
	27	* A1VPP CPLD NCR A1VPP
	28	* B0VCC SA-1111 GPIO A<2>
	29	* B1VCC SA-1111 GPIO A<3>
	30	* B0VPP ground (slot B is CF)
	31	* B1VPP ground (slot B is CF)
	32	*
	33	* VX VCC (5V)
	34	* VY VCC3_3 (3.3V)
	35	* 12INA 12V
	36	* 12INB ground (slot B is CF)
	37	*
	38	* The MAX1600 CODE pin is tied to ground, placing the device in
	39	* "Standard Intel code" mode. Refer to the Maxim data sheet for
	40	* the corresponding truth table.
	41	*/
	42
	43	static int
	44	neponset_pcmcia_configure_socket(struct soc_pcmcia_socket skt, const socket_state_t state)
	45	{
	46	unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set;
	47	int ret;
	48
	49	switch (skt->nr) {
	50	case 0:
	51	pa_dwr_mask = GPIO_A0 \| GPIO_A1;
	52	ncr_mask = NCR_A0VPP \| NCR_A1VPP;
	53
	54	if (state->Vpp == 0)
	55	ncr_set = 0;
	56	else if (state->Vpp == 120)
	57	ncr_set = NCR_A1VPP;
	58	else if (state->Vpp == state->Vcc)
	59	ncr_set = NCR_A0VPP;
	60	else {
	61	printk(KERN_ERR "%s(): unrecognized VPP %u\n",
	62	__FUNCTION__, state->Vpp);
	63	return -1;
	64	}
	65	break;
	66
	67	case 1:
	68	pa_dwr_mask = GPIO_A2 \| GPIO_A3;
	69	ncr_mask = 0;
	70	ncr_set = 0;
	71
72	if (state->Vpp != state->Vcc && state->Vpp != 0) {
73	printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
74	__FUNCTION__, state->Vpp);
75	return -1;
76	}
77	break;
78
79	default:
80	return -1;
81	}
82
83	/*
84	* pa_dwr_set is the mask for selecting Vcc on both sockets.
85	* pa_dwr_mask selects which bits (and therefore socket) we change.
86	*/
87	switch (state->Vcc) {
88	default:
89	case 0: pa_dwr_set = 0; break;
90	case 33: pa_dwr_set = GPIO_A1\|GPIO_A2; break;
91	case 50: pa_dwr_set = GPIO_A0\|GPIO_A3; break;
92	}
93
94	ret = sa1111_pcmcia_configure_socket(skt, state);
95	if (ret == 0) {
96	unsigned long flags;
97
98	local_irq_save(flags);
99	NCR_0 = (NCR_0 & ~ncr_mask) \| ncr_set;
100
101	local_irq_restore(flags);
102	sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
103	}
104
105	return 0;
106	}
107
108	static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
109	{
110	if (skt->nr == 0)
111	NCR_0 &= ~(NCR_A0VPP \| NCR_A1VPP);
112
113	sa1111_pcmcia_socket_init(skt);
114	}
115
116	static struct pcmcia_low_level neponset_pcmcia_ops = {
117	.owner = THIS_MODULE,
118	.hw_init = sa1111_pcmcia_hw_init,
119	.hw_shutdown = sa1111_pcmcia_hw_shutdown,
120	.socket_state = sa1111_pcmcia_socket_state,
121	.configure_socket = neponset_pcmcia_configure_socket,
122	.socket_init = neponset_pcmcia_socket_init,
123	.socket_suspend = sa1111_pcmcia_socket_suspend,
124	};
125
126	int __init pcmcia_neponset_init(struct sa1111_dev *sadev)
127	{
128	int ret = -ENODEV;
129
130	if (machine_is_assabet()) {
131	/*
132	* Set GPIO_A<3:0> to be outputs for the MAX1600,
133	* and switch to standby mode.
134	*/
135	sa1111_set_io_dir(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0, 0);
136	sa1111_set_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
137	sa1111_set_sleep_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
138	ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2);
139	}
140
141	return ret;
142	}