mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 03:26:40 +07:00
0178a7a54d
It's not needed, just use the "real" structure definition instead. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
538 lines
13 KiB
C
538 lines
13 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/timer.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/gpio.h>
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#include <bcm63xx_regs.h>
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#include <bcm63xx_io.h>
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#include "bcm63xx_pcmcia.h"
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#define PFX "bcm63xx_pcmcia: "
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#ifdef CONFIG_CARDBUS
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/* if cardbus is used, platform device needs reference to actual pci
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* device */
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static struct pci_dev *bcm63xx_cb_dev;
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#endif
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/*
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* read/write helper for pcmcia regs
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*/
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static inline u32 pcmcia_readl(struct bcm63xx_pcmcia_socket *skt, u32 off)
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{
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return bcm_readl(skt->base + off);
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}
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static inline void pcmcia_writel(struct bcm63xx_pcmcia_socket *skt,
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u32 val, u32 off)
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{
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bcm_writel(val, skt->base + off);
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}
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/*
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* This callback should (re-)initialise the socket, turn on status
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* interrupts and PCMCIA bus, and wait for power to stabilise so that
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* the card status signals report correctly.
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*
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* Hardware cannot do that.
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*/
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static int bcm63xx_pcmcia_sock_init(struct pcmcia_socket *sock)
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{
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return 0;
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}
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/*
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* This callback should remove power on the socket, disable IRQs from
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* the card, turn off status interrupts, and disable the PCMCIA bus.
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*
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* Hardware cannot do that.
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*/
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static int bcm63xx_pcmcia_suspend(struct pcmcia_socket *sock)
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{
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return 0;
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}
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/*
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* Implements the set_socket() operation for the in-kernel PCMCIA
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* service (formerly SS_SetSocket in Card Services). We more or
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* less punt all of this work and let the kernel handle the details
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* of power configuration, reset, &c. We also record the value of
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* `state' in order to regurgitate it to the PCMCIA core later.
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*/
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static int bcm63xx_pcmcia_set_socket(struct pcmcia_socket *sock,
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socket_state_t *state)
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{
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struct bcm63xx_pcmcia_socket *skt;
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unsigned long flags;
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u32 val;
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skt = sock->driver_data;
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spin_lock_irqsave(&skt->lock, flags);
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/* note: hardware cannot control socket power, so we will
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* always report SS_POWERON */
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/* apply socket reset */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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if (state->flags & SS_RESET)
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val |= PCMCIA_C1_RESET_MASK;
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else
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val &= ~PCMCIA_C1_RESET_MASK;
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/* reverse reset logic for cardbus card */
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if (skt->card_detected && (skt->card_type & CARD_CARDBUS))
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val ^= PCMCIA_C1_RESET_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* keep requested state for event reporting */
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skt->requested_state = *state;
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spin_unlock_irqrestore(&skt->lock, flags);
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return 0;
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}
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/*
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* identity cardtype from VS[12] input, CD[12] input while only VS2 is
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* floating, and CD[12] input while only VS1 is floating
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*/
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enum {
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IN_VS1 = (1 << 0),
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IN_VS2 = (1 << 1),
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IN_CD1_VS2H = (1 << 2),
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IN_CD2_VS2H = (1 << 3),
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IN_CD1_VS1H = (1 << 4),
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IN_CD2_VS1H = (1 << 5),
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};
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static const u8 vscd_to_cardtype[] = {
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/* VS1 float, VS2 float */
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[IN_VS1 | IN_VS2] = (CARD_PCCARD | CARD_5V),
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/* VS1 grounded, VS2 float */
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[IN_VS2] = (CARD_PCCARD | CARD_5V | CARD_3V),
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/* VS1 grounded, VS2 grounded */
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[0] = (CARD_PCCARD | CARD_5V | CARD_3V | CARD_XV),
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/* VS1 tied to CD1, VS2 float */
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[IN_VS1 | IN_VS2 | IN_CD1_VS1H] = (CARD_CARDBUS | CARD_3V),
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/* VS1 grounded, VS2 tied to CD2 */
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[IN_VS2 | IN_CD2_VS2H] = (CARD_CARDBUS | CARD_3V | CARD_XV),
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/* VS1 tied to CD2, VS2 grounded */
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[IN_VS1 | IN_CD2_VS1H] = (CARD_CARDBUS | CARD_3V | CARD_XV | CARD_YV),
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/* VS1 float, VS2 grounded */
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[IN_VS1] = (CARD_PCCARD | CARD_XV),
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/* VS1 float, VS2 tied to CD2 */
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[IN_VS1 | IN_VS2 | IN_CD2_VS2H] = (CARD_CARDBUS | CARD_3V),
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/* VS1 float, VS2 tied to CD1 */
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[IN_VS1 | IN_VS2 | IN_CD1_VS2H] = (CARD_CARDBUS | CARD_XV | CARD_YV),
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/* VS1 tied to CD2, VS2 float */
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[IN_VS1 | IN_VS2 | IN_CD2_VS1H] = (CARD_CARDBUS | CARD_YV),
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/* VS2 grounded, VS1 is tied to CD1, CD2 is grounded */
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[IN_VS1 | IN_CD1_VS1H] = 0, /* ignore cardbay */
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};
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/*
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* poll hardware to check card insertion status
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*/
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static unsigned int __get_socket_status(struct bcm63xx_pcmcia_socket *skt)
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{
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unsigned int stat;
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u32 val;
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stat = 0;
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/* check CD for card presence */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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if (!(val & PCMCIA_C1_CD1_MASK) && !(val & PCMCIA_C1_CD2_MASK))
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stat |= SS_DETECT;
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/* if new insertion, detect cardtype */
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if ((stat & SS_DETECT) && !skt->card_detected) {
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unsigned int stat = 0;
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/* float VS1, float VS2 */
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val |= PCMCIA_C1_VS1OE_MASK;
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val |= PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read VS[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_VS1_MASK) ? IN_VS1 : 0;
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stat |= (val & PCMCIA_C1_VS2_MASK) ? IN_VS2 : 0;
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/* drive VS1 low, float VS2 */
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val &= ~PCMCIA_C1_VS1OE_MASK;
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val |= PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read CD[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_CD1_MASK) ? IN_CD1_VS2H : 0;
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stat |= (val & PCMCIA_C1_CD2_MASK) ? IN_CD2_VS2H : 0;
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/* float VS1, drive VS2 low */
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val |= PCMCIA_C1_VS1OE_MASK;
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val &= ~PCMCIA_C1_VS2OE_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/* wait for output to stabilize and read CD[12] */
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udelay(10);
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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stat |= (val & PCMCIA_C1_CD1_MASK) ? IN_CD1_VS1H : 0;
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stat |= (val & PCMCIA_C1_CD2_MASK) ? IN_CD2_VS1H : 0;
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/* guess cardtype from all this */
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skt->card_type = vscd_to_cardtype[stat];
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if (!skt->card_type)
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dev_err(&skt->socket.dev, "unsupported card type\n");
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/* drive both VS pin to 0 again */
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val &= ~(PCMCIA_C1_VS1OE_MASK | PCMCIA_C1_VS2OE_MASK);
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/* enable correct logic */
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val &= ~(PCMCIA_C1_EN_PCMCIA_MASK | PCMCIA_C1_EN_CARDBUS_MASK);
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if (skt->card_type & CARD_PCCARD)
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val |= PCMCIA_C1_EN_PCMCIA_MASK;
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else
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val |= PCMCIA_C1_EN_CARDBUS_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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}
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skt->card_detected = (stat & SS_DETECT) ? 1 : 0;
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/* report card type/voltage */
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if (skt->card_type & CARD_CARDBUS)
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stat |= SS_CARDBUS;
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if (skt->card_type & CARD_3V)
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stat |= SS_3VCARD;
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if (skt->card_type & CARD_XV)
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stat |= SS_XVCARD;
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stat |= SS_POWERON;
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if (gpio_get_value(skt->pd->ready_gpio))
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stat |= SS_READY;
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return stat;
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}
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/*
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* core request to get current socket status
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*/
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static int bcm63xx_pcmcia_get_status(struct pcmcia_socket *sock,
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unsigned int *status)
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{
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struct bcm63xx_pcmcia_socket *skt;
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skt = sock->driver_data;
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spin_lock_bh(&skt->lock);
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*status = __get_socket_status(skt);
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spin_unlock_bh(&skt->lock);
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return 0;
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}
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/*
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* socket polling timer callback
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*/
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static void bcm63xx_pcmcia_poll(unsigned long data)
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{
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struct bcm63xx_pcmcia_socket *skt;
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unsigned int stat, events;
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skt = (struct bcm63xx_pcmcia_socket *)data;
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spin_lock_bh(&skt->lock);
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stat = __get_socket_status(skt);
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/* keep only changed bits, and mask with required one from the
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* core */
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events = (stat ^ skt->old_status) & skt->requested_state.csc_mask;
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skt->old_status = stat;
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spin_unlock_bh(&skt->lock);
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if (events)
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pcmcia_parse_events(&skt->socket, events);
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mod_timer(&skt->timer,
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jiffies + msecs_to_jiffies(BCM63XX_PCMCIA_POLL_RATE));
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}
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static int bcm63xx_pcmcia_set_io_map(struct pcmcia_socket *sock,
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struct pccard_io_map *map)
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{
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/* this doesn't seem to be called by pcmcia layer if static
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* mapping is used */
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return 0;
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}
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static int bcm63xx_pcmcia_set_mem_map(struct pcmcia_socket *sock,
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struct pccard_mem_map *map)
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{
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struct bcm63xx_pcmcia_socket *skt;
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struct resource *res;
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skt = sock->driver_data;
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if (map->flags & MAP_ATTRIB)
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res = skt->attr_res;
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else
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res = skt->common_res;
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map->static_start = res->start + map->card_start;
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return 0;
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}
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static struct pccard_operations bcm63xx_pcmcia_operations = {
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.init = bcm63xx_pcmcia_sock_init,
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.suspend = bcm63xx_pcmcia_suspend,
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.get_status = bcm63xx_pcmcia_get_status,
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.set_socket = bcm63xx_pcmcia_set_socket,
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.set_io_map = bcm63xx_pcmcia_set_io_map,
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.set_mem_map = bcm63xx_pcmcia_set_mem_map,
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};
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/*
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* register pcmcia socket to core
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*/
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static int bcm63xx_drv_pcmcia_probe(struct platform_device *pdev)
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{
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struct bcm63xx_pcmcia_socket *skt;
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struct pcmcia_socket *sock;
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struct resource *res, *irq_res;
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unsigned int regmem_size = 0, iomem_size = 0;
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u32 val;
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int ret;
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skt = kzalloc(sizeof(*skt), GFP_KERNEL);
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if (!skt)
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return -ENOMEM;
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spin_lock_init(&skt->lock);
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sock = &skt->socket;
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sock->driver_data = skt;
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/* make sure we have all resources we need */
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skt->common_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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skt->attr_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
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irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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skt->pd = pdev->dev.platform_data;
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if (!skt->common_res || !skt->attr_res || !irq_res || !skt->pd) {
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ret = -EINVAL;
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goto err;
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}
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/* remap pcmcia registers */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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regmem_size = resource_size(res);
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if (!request_mem_region(res->start, regmem_size, "bcm63xx_pcmcia")) {
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ret = -EINVAL;
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goto err;
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}
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skt->reg_res = res;
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skt->base = ioremap(res->start, regmem_size);
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if (!skt->base) {
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ret = -ENOMEM;
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goto err;
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}
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/* remap io registers */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
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iomem_size = resource_size(res);
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skt->io_base = ioremap(res->start, iomem_size);
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if (!skt->io_base) {
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ret = -ENOMEM;
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goto err;
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}
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/* resources are static */
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sock->resource_ops = &pccard_static_ops;
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sock->ops = &bcm63xx_pcmcia_operations;
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sock->owner = THIS_MODULE;
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sock->dev.parent = &pdev->dev;
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sock->features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
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sock->io_offset = (unsigned long)skt->io_base;
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sock->pci_irq = irq_res->start;
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#ifdef CONFIG_CARDBUS
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sock->cb_dev = bcm63xx_cb_dev;
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if (bcm63xx_cb_dev)
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sock->features |= SS_CAP_CARDBUS;
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#endif
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/* assume common & attribute memory have the same size */
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sock->map_size = resource_size(skt->common_res);
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/* initialize polling timer */
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setup_timer(&skt->timer, bcm63xx_pcmcia_poll, (unsigned long)skt);
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/* initialize pcmcia control register, drive VS[12] to 0,
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* leave CB IDSEL to the old value since it is set by the PCI
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* layer */
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val = pcmcia_readl(skt, PCMCIA_C1_REG);
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val &= PCMCIA_C1_CBIDSEL_MASK;
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val |= PCMCIA_C1_EN_PCMCIA_GPIO_MASK;
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pcmcia_writel(skt, val, PCMCIA_C1_REG);
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/*
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* Hardware has only one set of timings registers, not one for
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* each memory access type, so we configure them for the
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* slowest one: attribute memory.
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*/
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val = PCMCIA_C2_DATA16_MASK;
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val |= 10 << PCMCIA_C2_RWCOUNT_SHIFT;
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val |= 6 << PCMCIA_C2_INACTIVE_SHIFT;
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val |= 3 << PCMCIA_C2_SETUP_SHIFT;
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val |= 3 << PCMCIA_C2_HOLD_SHIFT;
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pcmcia_writel(skt, val, PCMCIA_C2_REG);
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ret = pcmcia_register_socket(sock);
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if (ret)
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goto err;
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/* start polling socket */
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mod_timer(&skt->timer,
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jiffies + msecs_to_jiffies(BCM63XX_PCMCIA_POLL_RATE));
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platform_set_drvdata(pdev, skt);
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return 0;
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err:
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if (skt->io_base)
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iounmap(skt->io_base);
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if (skt->base)
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iounmap(skt->base);
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if (skt->reg_res)
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release_mem_region(skt->reg_res->start, regmem_size);
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kfree(skt);
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return ret;
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}
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static int bcm63xx_drv_pcmcia_remove(struct platform_device *pdev)
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{
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struct bcm63xx_pcmcia_socket *skt;
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struct resource *res;
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skt = platform_get_drvdata(pdev);
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del_timer_sync(&skt->timer);
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iounmap(skt->base);
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iounmap(skt->io_base);
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res = skt->reg_res;
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release_mem_region(res->start, resource_size(res));
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kfree(skt);
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return 0;
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}
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struct platform_driver bcm63xx_pcmcia_driver = {
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.probe = bcm63xx_drv_pcmcia_probe,
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.remove = bcm63xx_drv_pcmcia_remove,
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.driver = {
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.name = "bcm63xx_pcmcia",
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.owner = THIS_MODULE,
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},
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};
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#ifdef CONFIG_CARDBUS
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static int bcm63xx_cb_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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/* keep pci device */
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bcm63xx_cb_dev = dev;
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return platform_driver_register(&bcm63xx_pcmcia_driver);
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}
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static void bcm63xx_cb_exit(struct pci_dev *dev)
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{
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platform_driver_unregister(&bcm63xx_pcmcia_driver);
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bcm63xx_cb_dev = NULL;
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}
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static const struct pci_device_id bcm63xx_cb_table[] = {
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{
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.vendor = PCI_VENDOR_ID_BROADCOM,
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.device = BCM6348_CPU_ID,
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.subvendor = PCI_VENDOR_ID_BROADCOM,
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.subdevice = PCI_ANY_ID,
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.class = PCI_CLASS_BRIDGE_CARDBUS << 8,
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.class_mask = ~0,
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},
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{
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.vendor = PCI_VENDOR_ID_BROADCOM,
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.device = BCM6358_CPU_ID,
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.subvendor = PCI_VENDOR_ID_BROADCOM,
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.subdevice = PCI_ANY_ID,
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.class = PCI_CLASS_BRIDGE_CARDBUS << 8,
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.class_mask = ~0,
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},
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|
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{ },
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};
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MODULE_DEVICE_TABLE(pci, bcm63xx_cb_table);
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|
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static struct pci_driver bcm63xx_cardbus_driver = {
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.name = "bcm63xx_cardbus",
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.id_table = bcm63xx_cb_table,
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.probe = bcm63xx_cb_probe,
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.remove = bcm63xx_cb_exit,
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};
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#endif
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|
|
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/*
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* if cardbus support is enabled, register our platform device after
|
|
* our fake cardbus bridge has been registered
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*/
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static int __init bcm63xx_pcmcia_init(void)
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|
{
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#ifdef CONFIG_CARDBUS
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return pci_register_driver(&bcm63xx_cardbus_driver);
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#else
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return platform_driver_register(&bcm63xx_pcmcia_driver);
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#endif
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}
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|
|
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static void __exit bcm63xx_pcmcia_exit(void)
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{
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|
#ifdef CONFIG_CARDBUS
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return pci_unregister_driver(&bcm63xx_cardbus_driver);
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#else
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|
platform_driver_unregister(&bcm63xx_pcmcia_driver);
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|
#endif
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|
}
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|
|
|
module_init(bcm63xx_pcmcia_init);
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|
module_exit(bcm63xx_pcmcia_exit);
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|
|
|
MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
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MODULE_DESCRIPTION("Linux PCMCIA Card Services: bcm63xx Socket Controller");
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