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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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203 lines
5.2 KiB
C
203 lines
5.2 KiB
C
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/*
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* linux/drivers/pcmcia/pxa2xx_mainstone.c
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*
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* Mainstone PCMCIA specific routines.
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*
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* Created: May 12, 2004
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* Author: Nicolas Pitre
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* Copyright: MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <pcmcia/ss.h>
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#include <asm/hardware.h>
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#include <asm/irq.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/mainstone.h>
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#include "soc_common.h"
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static struct pcmcia_irqs irqs[] = {
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{ 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
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{ 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
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{ 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
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{ 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
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};
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static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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/*
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* Setup default state of GPIO outputs
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* before we enable them as outputs.
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*/
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GPSR(GPIO48_nPOE) =
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GPIO_bit(GPIO48_nPOE) |
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GPIO_bit(GPIO49_nPWE) |
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GPIO_bit(GPIO50_nPIOR) |
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GPIO_bit(GPIO51_nPIOW) |
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GPIO_bit(GPIO85_nPCE_1) |
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GPIO_bit(GPIO54_nPCE_2);
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pxa_gpio_mode(GPIO48_nPOE_MD);
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pxa_gpio_mode(GPIO49_nPWE_MD);
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pxa_gpio_mode(GPIO50_nPIOR_MD);
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pxa_gpio_mode(GPIO51_nPIOW_MD);
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pxa_gpio_mode(GPIO85_nPCE_1_MD);
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pxa_gpio_mode(GPIO54_nPCE_2_MD);
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pxa_gpio_mode(GPIO79_pSKTSEL_MD);
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pxa_gpio_mode(GPIO55_nPREG_MD);
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pxa_gpio_mode(GPIO56_nPWAIT_MD);
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pxa_gpio_mode(GPIO57_nIOIS16_MD);
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skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static unsigned long mst_pcmcia_status[2];
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static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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unsigned long status, flip;
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status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
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flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
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/*
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* Workaround for STSCHG which can't be deasserted:
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* We therefore disable/enable corresponding IRQs
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* as needed to avoid IRQ locks.
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*/
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if (flip) {
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mst_pcmcia_status[skt->nr] = status;
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if (status & MST_PCMCIA_nSTSCHG_BVD1)
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enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
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: MAINSTONE_S1_STSCHG_IRQ );
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else
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disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
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: MAINSTONE_S1_STSCHG_IRQ );
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}
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state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
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state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
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state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
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state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
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state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
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state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
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state->wrprot = 0; /* not available */
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}
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static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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unsigned long power = 0;
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int ret = 0;
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switch (state->Vcc) {
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case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
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case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
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case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
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default:
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printk(KERN_ERR "%s(): bad Vcc %u\n",
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__FUNCTION__, state->Vcc);
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ret = -1;
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}
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switch (state->Vpp) {
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case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
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case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
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default:
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if(state->Vpp == state->Vcc) {
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power |= MST_PCMCIA_PWR_VPP_VCC;
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} else {
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printk(KERN_ERR "%s(): bad Vpp %u\n",
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__FUNCTION__, state->Vpp);
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ret = -1;
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}
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}
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if (state->flags & SS_RESET)
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power |= MST_PCMCIA_RESET;
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switch (skt->nr) {
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case 0: MST_PCMCIA0 = power; break;
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case 1: MST_PCMCIA1 = power; break;
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default: ret = -1;
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}
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return ret;
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}
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static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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}
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static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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}
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static struct pcmcia_low_level mst_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = mst_pcmcia_hw_init,
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.hw_shutdown = mst_pcmcia_hw_shutdown,
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.socket_state = mst_pcmcia_socket_state,
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.configure_socket = mst_pcmcia_configure_socket,
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.socket_init = mst_pcmcia_socket_init,
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.socket_suspend = mst_pcmcia_socket_suspend,
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.nr = 2,
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};
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static struct platform_device *mst_pcmcia_device;
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static int __init mst_pcmcia_init(void)
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{
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int ret;
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mst_pcmcia_device = kmalloc(sizeof(*mst_pcmcia_device), GFP_KERNEL);
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if (!mst_pcmcia_device)
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return -ENOMEM;
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memset(mst_pcmcia_device, 0, sizeof(*mst_pcmcia_device));
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mst_pcmcia_device->name = "pxa2xx-pcmcia";
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mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
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ret = platform_device_register(mst_pcmcia_device);
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if (ret)
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kfree(mst_pcmcia_device);
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return ret;
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}
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static void __exit mst_pcmcia_exit(void)
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{
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/*
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* This call is supposed to free our mst_pcmcia_device.
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* Unfortunately platform_device don't have a free method, and
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* we can't assume it's free of any reference at this point so we
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* can't free it either.
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*/
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platform_device_unregister(mst_pcmcia_device);
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}
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module_init(mst_pcmcia_init);
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module_exit(mst_pcmcia_exit);
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MODULE_LICENSE("GPL");
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