/* * Copyright (c) 2018 Synopsys * * SPDX-License-Identifier: Apache-2.0 */ #include #include #define PMODMUX_BASE_ADDR 0xF0000000 /* * 32-bits, offset 0x0, This register controls mapping of the peripheral device * signals on Pmod connectors */ #define PMOD_MUX_CTRL 0 /* 32-bits, offset 0x4 */ #define I2C_MAP_CTRL 1 /* * 32-bits, offset 0x8, SPI_MAP_CTRL[0] selects the mode of operation of the SPI * Slave: Normal operation, SPI_MAP_CTRL[0]=0: SPI Slave is connected to Pmod1 * at connector J1. Loop-back mode, SPI_MAP_CTRL[0]=1: SPI Slave is connected to * the SPI Master inside the FPGA using CS4. */ #define SPI_MAP_CTRL 2 /* * 32-bits, offset 0x8, This register controls the mapping of the UART signals * on the Pmod1 connector. */ #define UART_MAP_CTRL 3 #define BIT0 (0) #define BIT1 (1) #define BIT2 (2) #define BIT3 (3) #define PM1_OFFSET (0) #define PM2_OFFSET (4) #define PM3_OFFSET (8) #define PM4_OFFSET (12) #define PM5_OFFSET (16) #define PM6_OFFSET (20) #define PM7_OFFSET (24) #define PM1_MASK (0xf << PM1_OFFSET) #define PM2_MASK (0xf << PM2_OFFSET) #define PM3_MASK (0xf << PM3_OFFSET) #define PM4_MASK (0xf << PM4_OFFSET) #define PM5_MASK (0xf << PM5_OFFSET) #define PM6_MASK (0xf << PM6_OFFSET) #define PM7_MASK (0xf << PM7_OFFSET) #define SPI_MAP_NORMAL (0) #define SPI_MAP_LOOPBACK (1) #define UART_MAP_TYPE4 (0xE4) #define UART_MAP_TYPE3 (0x6C) /* all pins are configured as GPIO inputs */ #define PMOD_MUX_CTRL_DEFAULT (0) /* normal SPI mode */ #define SPI_MAP_CTRL_DEFAULT (SPI_MAP_NORMAL) /* TYPE4 PMOD compatible */ #define UART_MAP_CTRL_DEFAULT (UART_MAP_TYPE4) /* Pmod1[4:1] are connected to DW GPIO Port C[11:8] */ #define PM1_UR_GPIO_C ((0 << BIT0) << PM1_OFFSET) /* Pmod1[4:1] are connected to DW UART0 signals */ #define PM1_UR_UART_0 ((1 << BIT0) << PM1_OFFSET) /* Pmod1[10:7] are connected to DW GPIO Port A[11:8] */ #define PM1_LR_GPIO_A ((0 << BIT2) << PM1_OFFSET) /* Pmod1[10:7] are connected to DW SPI Slave signals */ #define PM1_LR_SPI_S ((1 << BIT2) << PM1_OFFSET) /* * Pmod2[4:1] are connected to DW GPIO Port C[15:12], * Pmod2[10:7] are connected to DW GPIO Port A[15:12] */ #define PM2_GPIO_AC ((0 << BIT0) << PM2_OFFSET) /* connect I2C to Pmod2[4:1] and halt/run interface to Pmod2[10:7] */ #define PM2_I2C_HRI ((1 << BIT0) << PM2_OFFSET) /* * Pmod3[4:1] are connected to DW GPIO Port C[19:16], * Pmod3[10:7] are connected to DW GPIO Port A[19:16] */ #define PM3_GPIO_AC ((0 << BIT0) << PM3_OFFSET) /* * Pmod3[4:3] are connected to DW I2C signals, * Pmod3[2:1] are connected to DW GPIO Port D[1:0], * Pmod3[10:7] are connected to DW GPIO Port D[3:2] */ #define PM3_I2C_GPIO_D ((1 << BIT0) << PM3_OFFSET) /* * Pmod4[4:1] are connected to DW GPIO Port C[23:20], * Pmod4[10:7] are connected to DW GPIO Port A[23:20] */ #define PM4_GPIO_AC ((0 << BIT0) << PM4_OFFSET) /* * Pmod4[4:3] are connected to DW I2C signals, * Pmod4[2:1] are connected to DW GPIO Port D[5:4], * Pmod4[10:7] are connected to DW GPIO Port D[7:6] */ #define PM4_I2C_GPIO_D ((1 << BIT0) << PM4_OFFSET) /* Pmod5[4:1] are connected to DW GPIO Port C[27:24] */ #define PM5_UR_GPIO_C ((0 << BIT0) << PM5_OFFSET) /* Pmod5[4:1] are connected to DW SPI Master signals using CS1_N */ #define PM5_UR_SPI_M1 ((1 << BIT0) << PM5_OFFSET) /* Pmod5[10:7] are connected to DW GPIO Port A[27:24] */ #define PM5_LR_GPIO_A ((0 << BIT2) << PM5_OFFSET) /* Pmod5[10:7] are connected to DW SPI Master signals using CS2_N */ #define PM5_LR_SPI_M2 ((1 << BIT2) << PM5_OFFSET) /* Pmod6[4:1] are connected to DW GPIO Port C[31:28] */ #define PM6_UR_GPIO_C ((0 << BIT0) << PM6_OFFSET) /* Pmod6[4:1] are connected to DW SPI Master signals using CS0_N */ #define PM6_UR_SPI_M0 ((1 << BIT0) << PM6_OFFSET) /* Pmod6[10:7] are connected to DW GPIO Port A[31:28] */ #define PM6_LR_GPIO_A ((0 << BIT2) << PM6_OFFSET) /* * Pmod6[8:7] are connected to the DW SPI Master chip select signals CS1_N and * CS2_N, Pmod6[6:5] are connected to the ARC EM halt and sleep status signals */ #define PM6_LR_CSS_STAT ((1 << BIT2) << PM6_OFFSET) static int pmod_mux_init(struct device *device) { volatile u32_t *mux_regs = (u32_t *)(PMODMUX_BASE_ADDR); mux_regs[SPI_MAP_CTRL] = SPI_MAP_CTRL_DEFAULT; mux_regs[UART_MAP_CTRL] = UART_MAP_CTRL_DEFAULT; /** * + Please refer to corresponding EMSK User Guide for detailed * information -> Appendix: A Hardware Functional Description -> * Pmods Configuration summary * + Set up pin-multiplexer of all PMOD connections * - PM1 J1: Upper row as UART 0, lower row as SPI Slave * - PM2 J2: IIC 0 and run/halt signals * - PM3 J3: GPIO Port A and Port C * - PM4 J4: IIC 1 and Port D * - PM5 J5: Upper row as SPI Master, lower row as Port A * - PM6 J6: Upper row as SPI Master, lower row as Port A */ mux_regs[PMOD_MUX_CTRL] = PM1_UR_UART_0 | PM1_LR_SPI_S | PM2_I2C_HRI | PM3_GPIO_AC | PM4_I2C_GPIO_D | PM5_UR_SPI_M1 | PM5_LR_GPIO_A | PM6_UR_SPI_M0 | PM6_LR_GPIO_A; return 0; } SYS_INIT(pmod_mux_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);