From a71a18f24d2631d8e2c527f7902e9f2665b3f6b6 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Fri, 26 Apr 2019 20:12:40 +0300 Subject: net: ethernet: ti: cpsw: introduce mac sl module api The MAC SL submodule has a lot of common functions between many of TI SoCs AM335x/AM437x/DRA7(AM57xx), Keystone 2 66AK2HK/E/L/G and K3 AM654, but there are also differences especially in registers offsets and sets of supported functions. This patch introduces the MAC SL submodule API which is intended to provide a common way to access the MAC SL submodule and hide HW integrations details. Signed-off-by: Grygorii Strashko Signed-off-by: Sekhar Nori Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/cpsw_sl.c | 328 ++++++++++++++++++++++++++++++++++++++ drivers/net/ethernet/ti/cpsw_sl.h | 73 +++++++++ 2 files changed, 401 insertions(+) create mode 100644 drivers/net/ethernet/ti/cpsw_sl.c create mode 100644 drivers/net/ethernet/ti/cpsw_sl.h diff --git a/drivers/net/ethernet/ti/cpsw_sl.c b/drivers/net/ethernet/ti/cpsw_sl.c new file mode 100644 index 000000000000..0c7531cb0f39 --- /dev/null +++ b/drivers/net/ethernet/ti/cpsw_sl.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Texas Instruments Ethernet Switch media-access-controller (MAC) submodule/ + * Ethernet MAC Sliver (CPGMAC_SL) + * + * Copyright (C) 2019 Texas Instruments + * + */ + +#include +#include +#include + +#include "cpsw_sl.h" + +#define CPSW_SL_REG_NOTUSED U16_MAX + +static const u16 cpsw_sl_reg_map_cpsw[] = { + [CPSW_SL_IDVER] = 0x00, + [CPSW_SL_MACCONTROL] = 0x04, + [CPSW_SL_MACSTATUS] = 0x08, + [CPSW_SL_SOFT_RESET] = 0x0c, + [CPSW_SL_RX_MAXLEN] = 0x10, + [CPSW_SL_BOFFTEST] = 0x14, + [CPSW_SL_RX_PAUSE] = 0x18, + [CPSW_SL_TX_PAUSE] = 0x1c, + [CPSW_SL_EMCONTROL] = 0x20, + [CPSW_SL_RX_PRI_MAP] = 0x24, + [CPSW_SL_TX_GAP] = 0x28, +}; + +static const u16 cpsw_sl_reg_map_66ak2hk[] = { + [CPSW_SL_IDVER] = 0x00, + [CPSW_SL_MACCONTROL] = 0x04, + [CPSW_SL_MACSTATUS] = 0x08, + [CPSW_SL_SOFT_RESET] = 0x0c, + [CPSW_SL_RX_MAXLEN] = 0x10, + [CPSW_SL_BOFFTEST] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_RX_PAUSE] = 0x18, + [CPSW_SL_TX_PAUSE] = 0x1c, + [CPSW_SL_EMCONTROL] = 0x20, + [CPSW_SL_RX_PRI_MAP] = 0x24, + [CPSW_SL_TX_GAP] = CPSW_SL_REG_NOTUSED, +}; + +static const u16 cpsw_sl_reg_map_66ak2x_xgbe[] = { + [CPSW_SL_IDVER] = 0x00, + [CPSW_SL_MACCONTROL] = 0x04, + [CPSW_SL_MACSTATUS] = 0x08, + [CPSW_SL_SOFT_RESET] = 0x0c, + [CPSW_SL_RX_MAXLEN] = 0x10, + [CPSW_SL_BOFFTEST] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_RX_PAUSE] = 0x18, + [CPSW_SL_TX_PAUSE] = 0x1c, + [CPSW_SL_EMCONTROL] = 0x20, + [CPSW_SL_RX_PRI_MAP] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_TX_GAP] = 0x28, +}; + +static const u16 cpsw_sl_reg_map_66ak2elg_am65[] = { + [CPSW_SL_IDVER] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_MACCONTROL] = 0x00, + [CPSW_SL_MACSTATUS] = 0x04, + [CPSW_SL_SOFT_RESET] = 0x08, + [CPSW_SL_RX_MAXLEN] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_BOFFTEST] = 0x0c, + [CPSW_SL_RX_PAUSE] = 0x10, + [CPSW_SL_TX_PAUSE] = 0x40, + [CPSW_SL_EMCONTROL] = 0x70, + [CPSW_SL_RX_PRI_MAP] = CPSW_SL_REG_NOTUSED, + [CPSW_SL_TX_GAP] = 0x74, +}; + +#define CPSW_SL_SOFT_RESET_BIT BIT(0) + +#define CPSW_SL_STATUS_PN_IDLE BIT(31) +#define CPSW_SL_AM65_STATUS_PN_E_IDLE BIT(30) +#define CPSW_SL_AM65_STATUS_PN_P_IDLE BIT(29) +#define CPSW_SL_AM65_STATUS_PN_TX_IDLE BIT(28) + +#define CPSW_SL_STATUS_IDLE_MASK_BASE (CPSW_SL_STATUS_PN_IDLE) + +#define CPSW_SL_STATUS_IDLE_MASK_K3 \ + (CPSW_SL_STATUS_IDLE_MASK_BASE | CPSW_SL_AM65_STATUS_PN_E_IDLE | \ + CPSW_SL_AM65_STATUS_PN_P_IDLE | CPSW_SL_AM65_STATUS_PN_TX_IDLE) + +#define CPSW_SL_CTL_FUNC_BASE \ + (CPSW_SL_CTL_FULLDUPLEX |\ + CPSW_SL_CTL_LOOPBACK |\ + CPSW_SL_CTL_RX_FLOW_EN |\ + CPSW_SL_CTL_TX_FLOW_EN |\ + CPSW_SL_CTL_GMII_EN |\ + CPSW_SL_CTL_TX_PACE |\ + CPSW_SL_CTL_GIG |\ + CPSW_SL_CTL_CMD_IDLE |\ + CPSW_SL_CTL_IFCTL_A |\ + CPSW_SL_CTL_IFCTL_B |\ + CPSW_SL_CTL_GIG_FORCE |\ + CPSW_SL_CTL_EXT_EN |\ + CPSW_SL_CTL_RX_CEF_EN |\ + CPSW_SL_CTL_RX_CSF_EN |\ + CPSW_SL_CTL_RX_CMF_EN) + +struct cpsw_sl { + struct device *dev; + void __iomem *sl_base; + const u16 *regs; + u32 control_features; + u32 idle_mask; +}; + +struct cpsw_sl_dev_id { + const char *device_id; + const u16 *regs; + const u32 control_features; + const u32 regs_offset; + const u32 idle_mask; +}; + +static const struct cpsw_sl_dev_id cpsw_sl_id_match[] = { + { + .device_id = "cpsw", + .regs = cpsw_sl_reg_map_cpsw, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_MTEST | + CPSW_SL_CTL_TX_SHORT_GAP_EN | + CPSW_SL_CTL_TX_SG_LIM_EN, + .idle_mask = CPSW_SL_STATUS_IDLE_MASK_BASE, + }, + { + .device_id = "66ak2hk", + .regs = cpsw_sl_reg_map_66ak2hk, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_TX_SHORT_GAP_EN, + .idle_mask = CPSW_SL_STATUS_IDLE_MASK_BASE, + }, + { + .device_id = "66ak2x_xgbe", + .regs = cpsw_sl_reg_map_66ak2x_xgbe, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_XGIG | + CPSW_SL_CTL_TX_SHORT_GAP_EN | + CPSW_SL_CTL_CRC_TYPE | + CPSW_SL_CTL_XGMII_EN, + .idle_mask = CPSW_SL_STATUS_IDLE_MASK_BASE, + }, + { + .device_id = "66ak2el", + .regs = cpsw_sl_reg_map_66ak2elg_am65, + .regs_offset = 0x330, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_MTEST | + CPSW_SL_CTL_TX_SHORT_GAP_EN | + CPSW_SL_CTL_CRC_TYPE | + CPSW_SL_CTL_EXT_EN_RX_FLO | + CPSW_SL_CTL_EXT_EN_TX_FLO | + CPSW_SL_CTL_TX_SG_LIM_EN, + .idle_mask = CPSW_SL_STATUS_IDLE_MASK_BASE, + }, + { + .device_id = "66ak2g", + .regs = cpsw_sl_reg_map_66ak2elg_am65, + .regs_offset = 0x330, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_MTEST | + CPSW_SL_CTL_CRC_TYPE | + CPSW_SL_CTL_EXT_EN_RX_FLO | + CPSW_SL_CTL_EXT_EN_TX_FLO, + }, + { + .device_id = "am65", + .regs = cpsw_sl_reg_map_66ak2elg_am65, + .regs_offset = 0x330, + .control_features = CPSW_SL_CTL_FUNC_BASE | + CPSW_SL_CTL_MTEST | + CPSW_SL_CTL_XGIG | + CPSW_SL_CTL_TX_SHORT_GAP_EN | + CPSW_SL_CTL_CRC_TYPE | + CPSW_SL_CTL_XGMII_EN | + CPSW_SL_CTL_EXT_EN_RX_FLO | + CPSW_SL_CTL_EXT_EN_TX_FLO | + CPSW_SL_CTL_TX_SG_LIM_EN | + CPSW_SL_CTL_EXT_EN_XGIG, + .idle_mask = CPSW_SL_STATUS_IDLE_MASK_K3, + }, + { }, +}; + +u32 cpsw_sl_reg_read(struct cpsw_sl *sl, enum cpsw_sl_regs reg) +{ + int val; + + if (sl->regs[reg] == CPSW_SL_REG_NOTUSED) { + dev_err(sl->dev, "cpsw_sl: not sup r reg: %04X\n", + sl->regs[reg]); + return 0; + } + + val = readl(sl->sl_base + sl->regs[reg]); + dev_dbg(sl->dev, "cpsw_sl: reg: %04X r 0x%08X\n", sl->regs[reg], val); + return val; +} + +void cpsw_sl_reg_write(struct cpsw_sl *sl, enum cpsw_sl_regs reg, u32 val) +{ + if (sl->regs[reg] == CPSW_SL_REG_NOTUSED) { + dev_err(sl->dev, "cpsw_sl: not sup w reg: %04X\n", + sl->regs[reg]); + return; + } + + dev_dbg(sl->dev, "cpsw_sl: reg: %04X w 0x%08X\n", sl->regs[reg], val); + writel(val, sl->sl_base + sl->regs[reg]); +} + +static const struct cpsw_sl_dev_id *cpsw_sl_match_id( + const struct cpsw_sl_dev_id *id, + const char *device_id) +{ + if (!id || !device_id) + return NULL; + + while (id->device_id) { + if (strcmp(device_id, id->device_id) == 0) + return id; + id++; + } + return NULL; +} + +struct cpsw_sl *cpsw_sl_get(const char *device_id, struct device *dev, + void __iomem *sl_base) +{ + const struct cpsw_sl_dev_id *sl_dev_id; + struct cpsw_sl *sl; + + sl = devm_kzalloc(dev, sizeof(struct cpsw_sl), GFP_KERNEL); + if (!sl) + return ERR_PTR(-ENOMEM); + sl->dev = dev; + sl->sl_base = sl_base; + + sl_dev_id = cpsw_sl_match_id(cpsw_sl_id_match, device_id); + if (!sl_dev_id) { + dev_err(sl->dev, "cpsw_sl: dev_id %s not found.\n", device_id); + return ERR_PTR(-EINVAL); + } + sl->regs = sl_dev_id->regs; + sl->control_features = sl_dev_id->control_features; + sl->idle_mask = sl_dev_id->idle_mask; + sl->sl_base += sl_dev_id->regs_offset; + + return sl; +} + +void cpsw_sl_reset(struct cpsw_sl *sl, unsigned long tmo) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(tmo); + + /* Set the soft reset bit */ + cpsw_sl_reg_write(sl, CPSW_SL_SOFT_RESET, CPSW_SL_SOFT_RESET_BIT); + + /* Wait for the bit to clear */ + do { + usleep_range(100, 200); + } while ((cpsw_sl_reg_read(sl, CPSW_SL_SOFT_RESET) & + CPSW_SL_SOFT_RESET_BIT) && + time_after(timeout, jiffies)); + + if (cpsw_sl_reg_read(sl, CPSW_SL_SOFT_RESET) & CPSW_SL_SOFT_RESET_BIT) + dev_err(sl->dev, "cpsw_sl failed to soft-reset.\n"); +} + +u32 cpsw_sl_ctl_set(struct cpsw_sl *sl, u32 ctl_funcs) +{ + u32 val; + + if (ctl_funcs & ~sl->control_features) { + dev_err(sl->dev, "cpsw_sl: unsupported func 0x%08X\n", + ctl_funcs & (~sl->control_features)); + return -EINVAL; + } + + val = cpsw_sl_reg_read(sl, CPSW_SL_MACCONTROL); + val |= ctl_funcs; + cpsw_sl_reg_write(sl, CPSW_SL_MACCONTROL, val); + + return 0; +} + +u32 cpsw_sl_ctl_clr(struct cpsw_sl *sl, u32 ctl_funcs) +{ + u32 val; + + if (ctl_funcs & ~sl->control_features) { + dev_err(sl->dev, "cpsw_sl: unsupported func 0x%08X\n", + ctl_funcs & (~sl->control_features)); + return -EINVAL; + } + + val = cpsw_sl_reg_read(sl, CPSW_SL_MACCONTROL); + val &= ~ctl_funcs; + cpsw_sl_reg_write(sl, CPSW_SL_MACCONTROL, val); + + return 0; +} + +void cpsw_sl_ctl_reset(struct cpsw_sl *sl) +{ + cpsw_sl_reg_write(sl, CPSW_SL_MACCONTROL, 0); +} + +int cpsw_sl_wait_for_idle(struct cpsw_sl *sl, unsigned long tmo) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(tmo); + + do { + usleep_range(100, 200); + } while (!(cpsw_sl_reg_read(sl, CPSW_SL_MACSTATUS) & + sl->idle_mask) && time_after(timeout, jiffies)); + + if (!(cpsw_sl_reg_read(sl, CPSW_SL_MACSTATUS) & sl->idle_mask)) { + dev_err(sl->dev, "cpsw_sl failed to soft-reset.\n"); + return -ETIMEDOUT; + } + + return 0; +} diff --git a/drivers/net/ethernet/ti/cpsw_sl.h b/drivers/net/ethernet/ti/cpsw_sl.h new file mode 100644 index 000000000000..a6d06a5a420f --- /dev/null +++ b/drivers/net/ethernet/ti/cpsw_sl.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Texas Instruments Ethernet Switch media-access-controller (MAC) submodule/ + * Ethernet MAC Sliver (CPGMAC_SL) APIs + * + * Copyright (C) 2019 Texas Instruments + * + */ + +#ifndef __TI_CPSW_SL_H__ +#define __TI_CPSW_SL_H__ + +#include + +enum cpsw_sl_regs { + CPSW_SL_IDVER, + CPSW_SL_MACCONTROL, + CPSW_SL_MACSTATUS, + CPSW_SL_SOFT_RESET, + CPSW_SL_RX_MAXLEN, + CPSW_SL_BOFFTEST, + CPSW_SL_RX_PAUSE, + CPSW_SL_TX_PAUSE, + CPSW_SL_EMCONTROL, + CPSW_SL_RX_PRI_MAP, + CPSW_SL_TX_GAP, +}; + +enum { + CPSW_SL_CTL_FULLDUPLEX = BIT(0), /* Full Duplex mode */ + CPSW_SL_CTL_LOOPBACK = BIT(1), /* Loop Back Mode */ + CPSW_SL_CTL_MTEST = BIT(2), /* Manufacturing Test mode */ + CPSW_SL_CTL_RX_FLOW_EN = BIT(3), /* Receive Flow Control Enable */ + CPSW_SL_CTL_TX_FLOW_EN = BIT(4), /* Transmit Flow Control Enable */ + CPSW_SL_CTL_GMII_EN = BIT(5), /* GMII Enable */ + CPSW_SL_CTL_TX_PACE = BIT(6), /* Transmit Pacing Enable */ + CPSW_SL_CTL_GIG = BIT(7), /* Gigabit Mode */ + CPSW_SL_CTL_XGIG = BIT(8), /* 10 Gigabit Mode */ + CPSW_SL_CTL_TX_SHORT_GAP_EN = BIT(10), /* Transmit Short Gap Enable */ + CPSW_SL_CTL_CMD_IDLE = BIT(11), /* Command Idle */ + CPSW_SL_CTL_CRC_TYPE = BIT(12), /* Port CRC Type */ + CPSW_SL_CTL_XGMII_EN = BIT(13), /* XGMII Enable */ + CPSW_SL_CTL_IFCTL_A = BIT(15), /* Interface Control A */ + CPSW_SL_CTL_IFCTL_B = BIT(16), /* Interface Control B */ + CPSW_SL_CTL_GIG_FORCE = BIT(17), /* Gigabit Mode Force */ + CPSW_SL_CTL_EXT_EN = BIT(18), /* External Control Enable */ + CPSW_SL_CTL_EXT_EN_RX_FLO = BIT(19), /* Ext RX Flow Control Enable */ + CPSW_SL_CTL_EXT_EN_TX_FLO = BIT(20), /* Ext TX Flow Control Enable */ + CPSW_SL_CTL_TX_SG_LIM_EN = BIT(21), /* TXt Short Gap Limit Enable */ + CPSW_SL_CTL_RX_CEF_EN = BIT(22), /* RX Copy Error Frames Enable */ + CPSW_SL_CTL_RX_CSF_EN = BIT(23), /* RX Copy Short Frames Enable */ + CPSW_SL_CTL_RX_CMF_EN = BIT(24), /* RX Copy MAC Control Frames Enable */ + CPSW_SL_CTL_EXT_EN_XGIG = BIT(25), /* Ext XGIG Control En, k3 only */ + + CPSW_SL_CTL_FUNCS_COUNT +}; + +struct cpsw_sl; + +struct cpsw_sl *cpsw_sl_get(const char *device_id, struct device *dev, + void __iomem *sl_base); + +void cpsw_sl_reset(struct cpsw_sl *sl, unsigned long tmo); + +u32 cpsw_sl_ctl_set(struct cpsw_sl *sl, u32 ctl_funcs); +u32 cpsw_sl_ctl_clr(struct cpsw_sl *sl, u32 ctl_funcs); +void cpsw_sl_ctl_reset(struct cpsw_sl *sl); +int cpsw_sl_wait_for_idle(struct cpsw_sl *sl, unsigned long tmo); + +u32 cpsw_sl_reg_read(struct cpsw_sl *sl, enum cpsw_sl_regs reg); +void cpsw_sl_reg_write(struct cpsw_sl *sl, enum cpsw_sl_regs reg, u32 val); + +#endif /* __TI_CPSW_SL_H__ */ -- cgit v1.2.3-59-g8ed1b