[linux.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/sched.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>
	8	#include <linux/sched.h>
	9	#include <linux/device.h>
	10	#include <linux/errno.h>
	11	#include <linux/init.h>
	12
	13	#include <asm/hardware.h>
	14	#include <asm/mach-types.h>
	15	#include <asm/arch/neponset.h>
	16	#include <asm/hardware/sa1111.h>
	17
	18	#include "sa1111_generic.h"
	19
	20	/*
	21	* Neponset uses the Maxim MAX1600, with the following connections:
	22	*
	23	* MAX1600 Neponset
	24	*
	25	* A0VCC SA-1111 GPIO A<1>
	26	* A1VCC SA-1111 GPIO A<0>
	27	* A0VPP CPLD NCR A0VPP
	28	* A1VPP CPLD NCR A1VPP
	29	* B0VCC SA-1111 GPIO A<2>
	30	* B1VCC SA-1111 GPIO A<3>
	31	* B0VPP ground (slot B is CF)
	32	* B1VPP ground (slot B is CF)
	33	*
	34	* VX VCC (5V)
	35	* VY VCC3_3 (3.3V)
	36	* 12INA 12V
	37	* 12INB ground (slot B is CF)
	38	*
	39	* The MAX1600 CODE pin is tied to ground, placing the device in
	40	* "Standard Intel code" mode. Refer to the Maxim data sheet for
	41	* the corresponding truth table.
	42	*/
	43
	44	static int
	45	neponset_pcmcia_configure_socket(struct soc_pcmcia_socket skt, const socket_state_t state)
	46	{
	47	unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set;
	48	int ret;
	49
	50	switch (skt->nr) {
	51	case 0:
	52	pa_dwr_mask = GPIO_A0 \| GPIO_A1;
	53	ncr_mask = NCR_A0VPP \| NCR_A1VPP;
	54
	55	if (state->Vpp == 0)
	56	ncr_set = 0;
	57	else if (state->Vpp == 120)
	58	ncr_set = NCR_A1VPP;
	59	else if (state->Vpp == state->Vcc)
	60	ncr_set = NCR_A0VPP;
	61	else {
	62	printk(KERN_ERR "%s(): unrecognized VPP %u\n",
	63	__FUNCTION__, state->Vpp);
	64	return -1;
65	}
66	break;
67
68	case 1:
69	pa_dwr_mask = GPIO_A2 \| GPIO_A3;
70	ncr_mask = 0;
71	ncr_set = 0;
72
73	if (state->Vpp != state->Vcc && state->Vpp != 0) {
74	printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
75	__FUNCTION__, state->Vpp);
76	return -1;
77	}
78	break;
79
80	default:
81	return -1;
82	}
83
84	/*
85	* pa_dwr_set is the mask for selecting Vcc on both sockets.
86	* pa_dwr_mask selects which bits (and therefore socket) we change.
87	*/
88	switch (state->Vcc) {
89	default:
90	case 0: pa_dwr_set = 0; break;
91	case 33: pa_dwr_set = GPIO_A1\|GPIO_A2; break;
92	case 50: pa_dwr_set = GPIO_A0\|GPIO_A3; break;
93	}
94
95	ret = sa1111_pcmcia_configure_socket(skt, state);
96	if (ret == 0) {
97	unsigned long flags;
98
99	local_irq_save(flags);
100	NCR_0 = (NCR_0 & ~ncr_mask) \| ncr_set;
101
102	local_irq_restore(flags);
103	sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
104	}
105
106	return 0;
107	}
108
109	static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
110	{
111	if (skt->nr == 0)
112	NCR_0 &= ~(NCR_A0VPP \| NCR_A1VPP);
113
114	sa1111_pcmcia_socket_init(skt);
115	}
116
117	static struct pcmcia_low_level neponset_pcmcia_ops = {
118	.owner = THIS_MODULE,
119	.hw_init = sa1111_pcmcia_hw_init,
120	.hw_shutdown = sa1111_pcmcia_hw_shutdown,
121	.socket_state = sa1111_pcmcia_socket_state,
122	.configure_socket = neponset_pcmcia_configure_socket,
123	.socket_init = neponset_pcmcia_socket_init,
124	.socket_suspend = sa1111_pcmcia_socket_suspend,
125	};
126
127	int __init pcmcia_neponset_init(struct sa1111_dev *sadev)
128	{
129	int ret = -ENODEV;
130
131	if (machine_is_assabet()) {
132	/*
133	* Set GPIO_A<3:0> to be outputs for the MAX1600,
134	* and switch to standby mode.
135	*/
136	sa1111_set_io_dir(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0, 0);
137	sa1111_set_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
138	sa1111_set_sleep_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
139	ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2);
140	}
141
142	return ret;
143	}