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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
210 lines
5.7 KiB
C
210 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* TI serdes driver for keystone2.
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*
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* (C) Copyright 2014
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <errno.h>
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#include <common.h>
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#include <asm/ti-common/keystone_serdes.h>
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#define SERDES_CMU_REGS(x) (0x0000 + (0x0c00 * (x)))
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#define SERDES_LANE_REGS(x) (0x0200 + (0x200 * (x)))
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#define SERDES_COMLANE_REGS 0x0a00
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#define SERDES_WIZ_REGS 0x1fc0
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#define SERDES_CMU_REG_000(x) (SERDES_CMU_REGS(x) + 0x000)
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#define SERDES_CMU_REG_010(x) (SERDES_CMU_REGS(x) + 0x010)
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#define SERDES_COMLANE_REG_000 (SERDES_COMLANE_REGS + 0x000)
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#define SERDES_LANE_REG_000(x) (SERDES_LANE_REGS(x) + 0x000)
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#define SERDES_LANE_REG_028(x) (SERDES_LANE_REGS(x) + 0x028)
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#define SERDES_LANE_CTL_STATUS_REG(x) (SERDES_WIZ_REGS + 0x0020 + (4 * (x)))
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#define SERDES_PLL_CTL_REG (SERDES_WIZ_REGS + 0x0034)
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#define SERDES_RESET BIT(28)
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#define SERDES_LANE_RESET BIT(29)
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#define SERDES_LANE_LOOPBACK BIT(30)
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#define SERDES_LANE_EN_VAL(x, y, z) (x[y] | (z << 26) | (z << 10))
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#define SERDES_CMU_CFG_NUM 5
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#define SERDES_COMLANE_CFG_NUM 10
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#define SERDES_LANE_CFG_NUM 10
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struct serdes_cfg {
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u32 ofs;
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u32 val;
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u32 mask;
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};
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struct cfg_entry {
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enum ks2_serdes_clock clk;
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enum ks2_serdes_rate rate;
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struct serdes_cfg cmu[SERDES_CMU_CFG_NUM];
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struct serdes_cfg comlane[SERDES_COMLANE_CFG_NUM];
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struct serdes_cfg lane[SERDES_LANE_CFG_NUM];
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};
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/* SERDES PHY lane enable configuration value, indexed by PHY interface */
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static u32 serdes_cfg_lane_enable[] = {
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0xf000f0c0, /* SGMII */
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0xf0e9f038, /* PCSR */
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};
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/* SERDES PHY PLL enable configuration value, indexed by PHY interface */
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static u32 serdes_cfg_pll_enable[] = {
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0xe0000000, /* SGMII */
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0xee000000, /* PCSR */
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};
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/**
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* Array to hold all possible serdes configurations.
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* Combination for 5 clock settings and 6 baud rates.
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*/
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static struct cfg_entry cfgs[] = {
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{
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.clk = SERDES_CLOCK_156P25M,
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.rate = SERDES_RATE_5G,
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.cmu = {
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{0x0000, 0x00800000, 0xffff0000},
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{0x0014, 0x00008282, 0x0000ffff},
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{0x0060, 0x00142438, 0x00ffffff},
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{0x0064, 0x00c3c700, 0x00ffff00},
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{0x0078, 0x0000c000, 0x0000ff00}
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},
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.comlane = {
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{0x0a00, 0x00000800, 0x0000ff00},
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{0x0a08, 0x38a20000, 0xffff0000},
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{0x0a30, 0x008a8a00, 0x00ffff00},
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{0x0a84, 0x00000600, 0x0000ff00},
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{0x0a94, 0x10000000, 0xff000000},
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{0x0aa0, 0x81000000, 0xff000000},
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{0x0abc, 0xff000000, 0xff000000},
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{0x0ac0, 0x0000008b, 0x000000ff},
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{0x0b08, 0x583f0000, 0xffff0000},
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{0x0b0c, 0x0000004e, 0x000000ff}
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},
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.lane = {
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{0x0004, 0x38000080, 0xff0000ff},
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{0x0008, 0x00000000, 0x000000ff},
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{0x000c, 0x02000000, 0xff000000},
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{0x0010, 0x1b000000, 0xff000000},
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{0x0014, 0x00006fb8, 0x0000ffff},
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{0x0018, 0x758000e4, 0xffff00ff},
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{0x00ac, 0x00004400, 0x0000ff00},
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{0x002c, 0x00100800, 0x00ffff00},
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{0x0080, 0x00820082, 0x00ff00ff},
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{0x0084, 0x1d0f0385, 0xffffffff}
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},
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},
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};
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static inline void ks2_serdes_rmw(u32 addr, u32 value, u32 mask)
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{
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writel(((readl(addr) & (~mask)) | (value & mask)), addr);
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}
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static void ks2_serdes_cfg_setup(u32 base, struct serdes_cfg *cfg, u32 size)
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{
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u32 i;
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for (i = 0; i < size; i++)
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ks2_serdes_rmw(base + cfg[i].ofs, cfg[i].val, cfg[i].mask);
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}
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static void ks2_serdes_lane_config(u32 base, struct serdes_cfg *cfg_lane,
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u32 size, u32 lane)
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{
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u32 i;
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for (i = 0; i < size; i++)
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ks2_serdes_rmw(base + cfg_lane[i].ofs + SERDES_LANE_REGS(lane),
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cfg_lane[i].val, cfg_lane[i].mask);
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}
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static int ks2_serdes_init_cfg(u32 base, struct cfg_entry *cfg, u32 num_lanes)
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{
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u32 i;
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ks2_serdes_cfg_setup(base, cfg->cmu, SERDES_CMU_CFG_NUM);
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ks2_serdes_cfg_setup(base, cfg->comlane, SERDES_COMLANE_CFG_NUM);
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for (i = 0; i < num_lanes; i++)
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ks2_serdes_lane_config(base, cfg->lane, SERDES_LANE_CFG_NUM, i);
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return 0;
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}
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static void ks2_serdes_cmu_comlane_enable(u32 base, struct ks2_serdes *serdes)
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{
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/* Bring SerDes out of Reset */
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ks2_serdes_rmw(base + SERDES_CMU_REG_010(0), 0x0, SERDES_RESET);
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if (serdes->intf == SERDES_PHY_PCSR)
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ks2_serdes_rmw(base + SERDES_CMU_REG_010(1), 0x0, SERDES_RESET);
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/* Enable CMU and COMLANE */
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ks2_serdes_rmw(base + SERDES_CMU_REG_000(0), 0x03, 0x000000ff);
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if (serdes->intf == SERDES_PHY_PCSR)
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ks2_serdes_rmw(base + SERDES_CMU_REG_000(1), 0x03, 0x000000ff);
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ks2_serdes_rmw(base + SERDES_COMLANE_REG_000, 0x5f, 0x000000ff);
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}
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static void ks2_serdes_pll_enable(u32 base, struct ks2_serdes *serdes)
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{
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writel(serdes_cfg_pll_enable[serdes->intf],
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base + SERDES_PLL_CTL_REG);
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}
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static void ks2_serdes_lane_reset(u32 base, u32 reset, u32 lane)
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{
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if (reset)
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ks2_serdes_rmw(base + SERDES_LANE_REG_028(lane),
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0x1, SERDES_LANE_RESET);
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else
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ks2_serdes_rmw(base + SERDES_LANE_REG_028(lane),
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0x0, SERDES_LANE_RESET);
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}
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static void ks2_serdes_lane_enable(u32 base,
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struct ks2_serdes *serdes, u32 lane)
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{
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/* Bring lane out of reset */
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ks2_serdes_lane_reset(base, 0, lane);
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writel(SERDES_LANE_EN_VAL(serdes_cfg_lane_enable, serdes->intf,
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serdes->rate_mode),
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base + SERDES_LANE_CTL_STATUS_REG(lane));
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/* Set NES bit if Loopback Enabled */
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if (serdes->loopback)
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ks2_serdes_rmw(base + SERDES_LANE_REG_000(lane),
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0x1, SERDES_LANE_LOOPBACK);
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}
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int ks2_serdes_init(u32 base, struct ks2_serdes *serdes, u32 num_lanes)
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{
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int i;
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int ret = 0;
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for (i = 0; i < ARRAY_SIZE(cfgs); i++)
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if (serdes->clk == cfgs[i].clk && serdes->rate == cfgs[i].rate)
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break;
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if (i >= ARRAY_SIZE(cfgs)) {
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puts("Cannot find keystone SerDes configuration");
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return -EINVAL;
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}
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ks2_serdes_init_cfg(base, &cfgs[i], num_lanes);
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ks2_serdes_cmu_comlane_enable(base, serdes);
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for (i = 0; i < num_lanes; i++)
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ks2_serdes_lane_enable(base, serdes, i);
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ks2_serdes_pll_enable(base, serdes);
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return ret;
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}
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