diff options
Diffstat (limited to 'payloads/libpayload/drivers/serial')
| -rw-r--r-- | payloads/libpayload/drivers/serial/qcom_qupv3_serial.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/serial/qcom_qupv3_serial.c b/payloads/libpayload/drivers/serial/qcom_qupv3_serial.c new file mode 100644 index 0000000000..9100a27a8c --- /dev/null +++ b/payloads/libpayload/drivers/serial/qcom_qupv3_serial.c @@ -0,0 +1,341 @@ +/* + * This file is part of the libpayload project. + * Copyright (c) 2020 Qualcomm Technologies. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of The Linux Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +/* For simplicity sake let's rely on coreboot initializing the UART. */ +#include <config.h> +#include <libpayload.h> +#include <sys/types.h> + +#define GENI_STATUS_M_GENI_CMD_ACTIVE_MASK 0x1 +#define RX_FIFO_WC_MSK 0x1FFFFFF +#define START_UART_TX 0x8000000 + +union proto_word_len { + u32 uart_tx_word_len; + u32 spi_word_len; +}; + +union proto_tx_trans_len { + u32 uart_tx_stop_bit_len; + u32 i2c_tx_trans_len; + u32 spi_tx_trans_len; +}; + +union proto_rx_trans_len { + u32 uart_tx_trans_len; + u32 i2c_rx_trans_len; + u32 spi_rx_trans_len; +}; + +struct qup_regs { + u32 geni_init_cfg_revision; + u32 geni_s_init_cfg_revision; + u8 _reserved1[0x10 - 0x08]; + u32 geni_general_cfg; + u32 geni_rx_fifo_ctrl; + u8 _reserved2[0x20 - 0x18]; + u32 geni_force_default_reg; + u32 geni_output_ctrl; + u32 geni_cgc_ctrl; + u32 geni_char_cfg; + u32 geni_char_data_n; + u8 _reserved3[0x40 - 0x34]; + u32 geni_status; + u32 geni_test_bus_ctrl; + u32 geni_ser_m_clk_cfg; + u32 geni_ser_s_clk_cfg; + u32 geni_prog_rom_ctrl_reg; + u8 _reserved4[0x60 - 0x54]; + u32 geni_clk_ctrl_ro; + u32 fifo_if_disable_ro; + u32 geni_fw_revision_ro; + u32 geni_s_fw_revision_ro; + u32 geni_fw_multilock_protns_ro; + u32 geni_fw_multilock_msa_ro; + u32 geni_fw_multilock_sp_ro; + u32 geni_clk_sel; + u32 geni_dfs_if_cfg; + u8 _reserved5[0x100 - 0x084]; + u32 geni_cfg_reg0; + u32 geni_cfg_reg1; + u32 geni_cfg_reg2; + u32 geni_cfg_reg3; + u32 geni_cfg_reg4; + u32 geni_cfg_reg5; + u32 geni_cfg_reg6; + u32 geni_cfg_reg7; + u32 geni_cfg_reg8; + u32 geni_cfg_reg9; + u32 geni_cfg_reg10; + u32 geni_cfg_reg11; + u32 geni_cfg_reg12; + u32 geni_cfg_reg13; + u32 geni_cfg_reg14; + u32 geni_cfg_reg15; + u32 geni_cfg_reg16; + u32 geni_cfg_reg17; + u32 geni_cfg_reg18; + u8 _reserved6[0x200 - 0x14C]; + u32 geni_cfg_reg64; + u32 geni_cfg_reg65; + u32 geni_cfg_reg66; + u32 geni_cfg_reg67; + u32 geni_cfg_reg68; + u32 geni_cfg_reg69; + u32 geni_cfg_reg70; + u32 geni_cfg_reg71; + u32 geni_cfg_reg72; + u32 spi_cpha; + u32 geni_cfg_reg74; + u32 proto_loopback_cfg; + u32 spi_cpol; + u32 i2c_noise_cancellation_ctl; + u32 i2c_monitor_ctl; + u32 geni_cfg_reg79; + u32 geni_cfg_reg80; + u32 geni_cfg_reg81; + u32 geni_cfg_reg82; + u32 spi_demux_output_inv; + u32 spi_demux_sel; + u32 geni_byte_granularity; + u32 geni_dma_mode_en; + u32 uart_tx_trans_cfg_reg; + u32 geni_tx_packing_cfg0; + u32 geni_tx_packing_cfg1; + union proto_word_len word_len; + union proto_tx_trans_len tx_trans_len; + union proto_rx_trans_len rx_trans_len; + u32 spi_pre_post_cmd_dly; + u32 i2c_scl_counters; + u32 geni_cfg_reg95; + u32 uart_rx_trans_cfg; + u32 geni_rx_packing_cfg0; + u32 geni_rx_packing_cfg1; + u32 uart_rx_word_len; + u32 geni_cfg_reg100; + u32 uart_rx_stale_cnt; + u32 geni_cfg_reg102; + u32 geni_cfg_reg103; + u32 geni_cfg_reg104; + u32 uart_tx_parity_cfg; + u32 uart_rx_parity_cfg; + u32 uart_manual_rfr; + u32 geni_cfg_reg108; + u32 geni_cfg_reg109; + u32 geni_cfg_reg110; + u8 _reserved7[0x600 - 0x2BC]; + u32 geni_m_cmd0; + u32 geni_m_cmd_ctrl_reg; + u8 _reserved8[0x10 - 0x08]; + u32 geni_m_irq_status; + u32 geni_m_irq_enable; + u32 geni_m_irq_clear; + u32 geni_m_irq_en_set; + u32 geni_m_irq_en_clear; + u32 geni_m_cmd_err_status; + u32 geni_m_fw_err_status; + u8 _reserved9[0x30 - 0x2C]; + u32 geni_s_cmd0; + u32 geni_s_cmd_ctrl_reg; + u8 _reserved10[0x40 - 0x38]; + u32 geni_s_irq_status; + u32 geni_s_irq_enable; + u32 geni_s_irq_clear; + u32 geni_s_irq_en_set; + u32 geni_s_irq_en_clear; + u8 _reserved11[0x700 - 0x654]; + u32 geni_tx_fifon; + u8 _reserved12[0x780 - 0x704]; + u32 geni_rx_fifon; + u8 _reserved13[0x800 - 0x784]; + u32 geni_tx_fifo_status; + u32 geni_rx_fifo_status; + u32 geni_tx_fifo_threshold; + u32 geni_tx_watermark_reg; + u32 geni_rx_watermark_reg; + u32 geni_rx_rfr_watermark_reg; + u8 _reserved14[0x900 - 0x818]; + u32 geni_gp_output_reg; + u8 _reserved15[0x908 - 0x904]; + u32 geni_ios; + u32 geni_timestamp; + u32 geni_m_gp_length; + u32 geni_s_gp_length; + u8 _reserved16[0x920 - 0x918]; + u32 geni_hw_irq_en; + u32 geni_hw_irq_ignore_on_active; + u8 _reserved17[0x930 - 0x928]; + u32 geni_hw_irq_cmd_param_0; + u8 _reserved18[0xA00 - 0x934]; + u32 geni_i3c_ibi_cfg_tablen; + u8 _reserved19[0xA80 - 0xA04]; + u32 geni_i3c_ibi_status; + u32 geni_i3c_ibi_rd_data; + u32 geni_i3c_ibi_search_pattern; + u32 geni_i3c_ibi_search_data; + u32 geni_i3c_sw_ibi_en; + u32 geni_i3c_sw_ibi_en_recover; + u8 _reserved20[0xC30 - 0xA98]; + u32 dma_tx_ptr_l; + u32 dma_tx_ptr_h; + u32 dma_tx_attr; + u32 dma_tx_length; + u32 dma_tx_irq_stat; + u32 dma_tx_irq_clr; + u32 dma_tx_irq_en; + u32 dma_tx_irq_en_set; + u32 dma_tx_irq_en_clr; + u32 dma_tx_length_in; + u32 dma_tx_fsm_rst; + u32 dma_tx_max_burst_size; + u8 _reserved21[0xD30 - 0xC60]; + u32 dma_rx_ptr_l; + u32 dma_rx_ptr_h; + u32 dma_rx_attr; + u32 dma_rx_length; + u32 dma_rx_irq_stat; + u32 dma_rx_irq_clr; + u32 dma_rx_irq_en; + u32 dma_rx_irq_en_set; + u32 dma_rx_irq_en_clr; + u32 dma_rx_length_in; + u32 dma_rx_fsm_rst; + u32 dma_rx_max_burst_size; + u32 dma_rx_flush; + u8 _reserved22[0xE14 - 0xD64]; + u32 se_irq_high_priority; + u32 se_gsi_event_en; + u32 se_irq_en; + u32 dma_if_en_ro; + u32 se_hw_param_0; + u32 se_hw_param_1; + u32 se_hw_param_2; + u32 dma_general_cfg; + u8 _reserved23[0x40 - 0x34]; + u32 dma_debug_reg0; + u32 dma_test_bus_ctrl; + u32 se_top_test_bus_ctrl; + u8 _reserved24[0x1000 - 0x0E4C]; + u32 se_geni_fw_revision; + u32 se_s_fw_revision; + u8 _reserved25[0x10-0x08]; + u32 se_geni_cfg_ramn; + u8 _reserved26[0x2000 - 0x1014]; + u32 se_geni_clk_ctrl; + u32 se_dma_if_en; + u32 se_fifo_if_disable; + u32 se_geni_fw_multilock_protns; + u32 se_geni_fw_multilock_msa; + u32 se_geni_fw_multilock_sp; +}; +check_member(qup_regs, geni_clk_sel, 0x7C); +check_member(qup_regs, geni_cfg_reg108, 0x2B0); +check_member(qup_regs, geni_dma_mode_en, 0x258); +check_member(qup_regs, geni_i3c_ibi_rd_data, 0xA84); +check_member(qup_regs, dma_test_bus_ctrl, 0xE44); +check_member(qup_regs, se_geni_cfg_ramn, 0x1010); +check_member(qup_regs, se_geni_fw_multilock_sp, 0x2014); + +static struct console_input_driver consin = { + .havekey = serial_havechar, + .getchar = serial_getchar, + .input_type = CONSOLE_INPUT_TYPE_UART, +}; + +static struct console_output_driver consout = { + .putchar = serial_putchar, +}; + +static struct qup_regs *uart_base_address(void) +{ + return (void *)(uintptr_t)lib_sysinfo.serial->baseaddr; +} + +static void uart_qupv3_tx_flush(void) +{ + struct qup_regs *regs = uart_base_address(); + + while (read32(®s->geni_status) & GENI_STATUS_M_GENI_CMD_ACTIVE_MASK) + ; +} + +static unsigned char uart_qupv3_rx_byte(void) +{ + struct qup_regs *regs = uart_base_address(); + + if (read32(®s->geni_rx_fifo_status) & RX_FIFO_WC_MSK) + return read32(®s->geni_rx_fifon) & 0xFF; + + return 0; +} + +static void uart_qupv3_tx_byte(unsigned char data) +{ + struct qup_regs *regs = uart_base_address(); + + uart_qupv3_tx_flush(); + + write32(®s->rx_trans_len.uart_tx_trans_len, 1); + /* Start TX */ + write32(®s->geni_m_cmd0, START_UART_TX); + write32(®s->geni_tx_fifon, data); +} + +void serial_putchar(unsigned int data) +{ + if (data == 0xa) + uart_qupv3_tx_byte(0xd); + uart_qupv3_tx_byte(data); +} + +int serial_havechar(void) +{ + struct qup_regs *regs = uart_base_address(); + + if (read32(®s->geni_rx_fifo_status) & RX_FIFO_WC_MSK) + return 1; + + return 0; +} + +int serial_getchar(void) +{ + return uart_qupv3_rx_byte(); +} + +void serial_console_init(void) +{ + if (!lib_sysinfo.serial) + return; + + console_add_output_driver(&consout); + console_add_input_driver(&consin); +} |