libpayload: Add uart/serial driver support for trogdor

Change-Id: I5be3904298cd88c60dbc6d8d662beeede2abe442
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35960
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 342 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/Makefile.inc b/payloads/libpayload/drivers/Makefile.inc
index a3916700df..115cf40285 100644
--- a/payloads/libpayload/drivers/Makefile.inc
+++ b/payloads/libpayload/drivers/Makefile.inc
@@ -38,6 +38,7 @@ libc-$(CONFIG_LP_S5P_SERIAL_CONSOLE) += serial/s5p.c serial/serial.c
 libc-$(CONFIG_LP_IPQ806X_SERIAL_CONSOLE) += serial/ipq806x.c serial/serial.c
 libc-$(CONFIG_LP_IPQ40XX_SERIAL_CONSOLE) += serial/ipq40xx.c serial/serial.c
 libc-$(CONFIG_LP_QCS405_SERIAL_CONSOLE) += serial/qcs405.c serial/serial.c
+libc-$(CONFIG_LP_QUALCOMM_QUPV3_SERIAL_CONSOLE) += serial/qcom_qupv3_serial.c serial/serial.c
 libc-$(CONFIG_LP_PC_KEYBOARD) += i8042/keyboard.c
 libc-$(CONFIG_LP_PC_MOUSE) += i8042/mouse.c
 libc-$(CONFIG_LP_PC_I8042) += i8042/i8042.c
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(&regs->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(&regs->geni_rx_fifo_status) & RX_FIFO_WC_MSK)
+		return read32(&regs->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(&regs->rx_trans_len.uart_tx_trans_len, 1);
+	/* Start TX */
+	write32(&regs->geni_m_cmd0, START_UART_TX);
+	write32(&regs->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(&regs->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);
+}