Kongyang Liu | 1fbf86c | 2024-04-20 15:00:27 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (c) 2024, Kongyang Liu <seashell11234455@gmail.com> |
| 4 | */ |
| 5 | |
| 6 | #include <linux/io.h> |
| 7 | #include <linux/bitops.h> |
| 8 | #include <linux/mii.h> |
| 9 | |
| 10 | #define REG_EPHY_TOP_WRAP (u32 *)0x03009800 |
| 11 | #define REG_EPHY_BASE (u32 *)0x03009000 |
| 12 | |
| 13 | #define REG_EPHY_CTL REG_EPHY_TOP_WRAP |
| 14 | #define REG_EPHY_APB_RW_SEL REG_EPHY_TOP_WRAP + 1 |
| 15 | |
| 16 | /* Page 0 register */ |
| 17 | #define REG_PHY_ID1 REG_EPHY_BASE + MII_PHYSID1 |
| 18 | #define REG_PHY_ID2 REG_EPHY_BASE + MII_PHYSID2 |
| 19 | #define REG_PHY_PAGE_SEL REG_EPHY_BASE + 0x1f |
| 20 | |
| 21 | /* Page 5 register */ |
| 22 | #define REG_PD_EN_CTL REG_EPHY_BASE + 0x10 |
| 23 | |
| 24 | /* REG_EPHY_CTL */ |
| 25 | #define REG_EPHY_SHUTDOWN BIT(0) |
| 26 | #define REG_EPHY_ANA_RST_N BIT(1) |
| 27 | #define REG_EPHY_DIG_RST_N BIT(2) |
| 28 | #define REG_EPHY_MAIN_RST_N BIT(3) |
| 29 | |
| 30 | /* REG_PD_EN_CTL */ |
| 31 | #define REG_EN_ETH_TXRT BIT(0) |
| 32 | #define REG_EN_ETH_CLK100M BIT(1) |
| 33 | #define REG_EN_ETH_CLK125M BIT(2) |
| 34 | #define REG_EN_ETH_PLL_LCKDET BIT(3) |
| 35 | #define REG_EN_ETH_RXADC BIT(4) |
| 36 | #define REG_EN_ETH_RXPGA BIT(5) |
| 37 | #define REG_EN_ETH_RXRT BIT(6) |
| 38 | #define REG_EN_ETH_TXCROSSOVER BIT(7) |
| 39 | #define REG_PD_ETH_PLL BIT(8) |
| 40 | #define REG_PD_ETH_TXDAC BIT(9) |
| 41 | #define REG_PD_ETH_TXDACBST BIT(10) |
| 42 | #define REG_PD_ETH_TXECHO BIT(11) |
| 43 | #define REG_PD_ETH_TXDRV_NMOS BIT(12) |
| 44 | #define REG_PD_ETH_TXLDO BIT(13) |
| 45 | |
| 46 | void cv1800b_ephy_init(void) |
| 47 | { |
| 48 | u32 reg; |
| 49 | u32 phy_id = 1; |
| 50 | |
| 51 | /* enable direct memory access for phy register */ |
| 52 | writel(1, REG_EPHY_APB_RW_SEL); |
| 53 | |
| 54 | reg = readl(REG_EPHY_CTL); |
| 55 | reg &= ~REG_EPHY_SHUTDOWN; |
| 56 | reg |= REG_EPHY_ANA_RST_N | REG_EPHY_DIG_RST_N | REG_EPHY_MAIN_RST_N; |
| 57 | writel(reg, REG_EPHY_CTL); |
| 58 | |
| 59 | /* switch to page 5 */ |
| 60 | writel(5 << 8, REG_PHY_PAGE_SEL); |
| 61 | reg = readl(REG_PD_EN_CTL); |
| 62 | reg &= ~(REG_PD_ETH_TXLDO | REG_PD_ETH_TXDRV_NMOS | REG_PD_ETH_TXDAC | REG_PD_ETH_PLL); |
| 63 | reg |= REG_EN_ETH_TXRT | REG_EN_ETH_CLK100M | REG_EN_ETH_CLK125M |
| 64 | | REG_EN_ETH_PLL_LCKDET | REG_EN_ETH_RXADC | REG_EN_ETH_RXPGA | REG_EN_ETH_RXRT; |
| 65 | writel(reg, REG_PD_EN_CTL); |
| 66 | |
| 67 | /* switch to page 0 */ |
| 68 | writel(0 << 8, REG_PHY_PAGE_SEL); |
| 69 | /* |
| 70 | * As the phy_id in the cv1800b PHY register is initialized to 0, it |
| 71 | * is necessary to manually initialize the phy_id to an arbitrary |
| 72 | * value so that it could corresponds to the generic PHY driver. |
| 73 | */ |
| 74 | writel(phy_id >> 16, REG_PHY_ID1); |
| 75 | writel(phy_id & 0xffff, REG_PHY_ID2); |
| 76 | |
| 77 | /* switch to MDIO control */ |
| 78 | writel(0, REG_EPHY_APB_RW_SEL); |
| 79 | } |