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MIPS: Lantiq: Add support for gphy firmware loading for ar10 and grx390 

Signed-off-by: Hauke Mehrtens <hauke.mehrtens@lantiq.com>
Acked-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11389/
Patchwork: https://patchwork.linux-mips.org/patch/11398/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Hauke Mehrtens 2015-10-28 23:37:38 +01:00 committed by Ralf Baechle
parent d0b991e376
commit eefee024b0
1 changed files with 92 additions and 20 deletions
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112
arch/mips/lantiq/xway/reset.c
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@ -4,6 +4,7 @@
* by the Free Software Foundation.
*
* Copyright (C) 2010 John Crispin <blogic@openwrt.org>
* Copyright (C) 2013-2015 Lantiq Beteiligungs-GmbH & Co.KG
*/
#include <linux/init.h>
@ -22,9 +23,6 @@
#include "../prom.h"
#define ltq_rcu_w32(x, y) ltq_w32((x), ltq_rcu_membase + (y))
#define ltq_rcu_r32(x) ltq_r32(ltq_rcu_membase + (x))
/* reset request register */
#define RCU_RST_REQ 0x0010
/* reset status register */
@ -32,11 +30,29 @@
/* vr9 gphy registers */
#define RCU_GFS_ADD0_XRX200 0x0020
#define RCU_GFS_ADD1_XRX200 0x0068
/* xRX300 gphy registers */
#define RCU_GFS_ADD0_XRX300 0x0020
#define RCU_GFS_ADD1_XRX300 0x0058
#define RCU_GFS_ADD2_XRX300 0x00AC
/* xRX330 gphy registers */
#define RCU_GFS_ADD0_XRX330 0x0020
#define RCU_GFS_ADD1_XRX330 0x0058
#define RCU_GFS_ADD2_XRX330 0x00AC
#define RCU_GFS_ADD3_XRX330 0x0264
/* reboot bit */
#define RCU_RD_GPHY0_XRX200 BIT(31)
#define RCU_RD_SRST BIT(30)
#define RCU_RD_GPHY1_XRX200 BIT(29)
/* xRX300 bits */
#define RCU_RD_GPHY0_XRX300 BIT(31)
#define RCU_RD_GPHY1_XRX300 BIT(29)
#define RCU_RD_GPHY2_XRX300 BIT(28)
/* xRX330 bits */
#define RCU_RD_GPHY0_XRX330 BIT(31)
#define RCU_RD_GPHY1_XRX330 BIT(29)
#define RCU_RD_GPHY2_XRX330 BIT(28)
#define RCU_RD_GPHY3_XRX330 BIT(10)
/* reset cause */
#define RCU_STAT_SHIFT 26
@ -47,6 +63,26 @@
/* remapped base addr of the reset control unit */
static void __iomem *ltq_rcu_membase;
static struct device_node *ltq_rcu_np;
static DEFINE_SPINLOCK(ltq_rcu_lock);
static void ltq_rcu_w32(uint32_t val, uint32_t reg_off)
{
ltq_w32(val, ltq_rcu_membase + reg_off);
}
static uint32_t ltq_rcu_r32(uint32_t reg_off)
{
return ltq_r32(ltq_rcu_membase + reg_off);
}
static void ltq_rcu_w32_mask(uint32_t clr, uint32_t set, uint32_t reg_off)
{
unsigned long flags;
spin_lock_irqsave(&ltq_rcu_lock, flags);
ltq_rcu_w32((ltq_rcu_r32(reg_off) & ~(clr)) | (set), reg_off);
spin_unlock_irqrestore(&ltq_rcu_lock, flags);
}
/* This function is used by the watchdog driver */
int ltq_reset_cause(void)
@ -67,15 +103,40 @@ unsigned char ltq_boot_select(void)
return RCU_BOOT_SEL(val);
}
/* reset / boot a gphy */
static struct ltq_xrx200_gphy_reset {
struct ltq_gphy_reset {
u32 rd;
u32 addr;
} xrx200_gphy[] = {
};
/* reset / boot a gphy */
static struct ltq_gphy_reset xrx200_gphy[] = {
{RCU_RD_GPHY0_XRX200, RCU_GFS_ADD0_XRX200},
{RCU_RD_GPHY1_XRX200, RCU_GFS_ADD1_XRX200},
};
/* reset / boot a gphy */
static struct ltq_gphy_reset xrx300_gphy[] = {
{RCU_RD_GPHY0_XRX300, RCU_GFS_ADD0_XRX300},
{RCU_RD_GPHY1_XRX300, RCU_GFS_ADD1_XRX300},
{RCU_RD_GPHY2_XRX300, RCU_GFS_ADD2_XRX300},
};
/* reset / boot a gphy */
static struct ltq_gphy_reset xrx330_gphy[] = {
{RCU_RD_GPHY0_XRX330, RCU_GFS_ADD0_XRX330},
{RCU_RD_GPHY1_XRX330, RCU_GFS_ADD1_XRX330},
{RCU_RD_GPHY2_XRX330, RCU_GFS_ADD2_XRX330},
{RCU_RD_GPHY3_XRX330, RCU_GFS_ADD3_XRX330},
};
static void xrx200_gphy_boot_addr(struct ltq_gphy_reset *phy_regs,
dma_addr_t dev_addr)
{
ltq_rcu_w32_mask(0, phy_regs->rd, RCU_RST_REQ);
ltq_rcu_w32(dev_addr, phy_regs->addr);
ltq_rcu_w32_mask(phy_regs->rd, 0, RCU_RST_REQ);
}
/* reset and boot a gphy. these phys only exist on xrx200 SoC */
int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr)
{
@ -86,23 +147,34 @@ int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr)
return -EINVAL;
}
clk = clk_get_sys("1f203000.rcu", "gphy");
if (IS_ERR(clk))
return PTR_ERR(clk);
clk_enable(clk);
if (id > 1) {
dev_err(dev, "%u is an invalid gphy id\n", id);
return -EINVAL;
if (of_machine_is_compatible("lantiq,vr9")) {
clk = clk_get_sys("1f203000.rcu", "gphy");
if (IS_ERR(clk))
return PTR_ERR(clk);
clk_enable(clk);
}
dev_info(dev, "booting GPHY%u firmware at %X\n", id, dev_addr);
ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | xrx200_gphy[id].rd,
RCU_RST_REQ);
ltq_rcu_w32(dev_addr, xrx200_gphy[id].addr);
ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~xrx200_gphy[id].rd,
RCU_RST_REQ);
if (of_machine_is_compatible("lantiq,vr9")) {
if (id >= ARRAY_SIZE(xrx200_gphy)) {
dev_err(dev, "%u is an invalid gphy id\n", id);
return -EINVAL;
}
xrx200_gphy_boot_addr(&xrx200_gphy[id], dev_addr);
} else if (of_machine_is_compatible("lantiq,ar10")) {
if (id >= ARRAY_SIZE(xrx300_gphy)) {
dev_err(dev, "%u is an invalid gphy id\n", id);
return -EINVAL;
}
xrx200_gphy_boot_addr(&xrx300_gphy[id], dev_addr);
} else if (of_machine_is_compatible("lantiq,grx390")) {
if (id >= ARRAY_SIZE(xrx330_gphy)) {
dev_err(dev, "%u is an invalid gphy id\n", id);
return -EINVAL;
}
xrx200_gphy_boot_addr(&xrx330_gphy[id], dev_addr);
}
return 0;
}