serial: add snapshot of msm_serial_hs_lite driver

* Qualcomm MSM UART

Required properties:

- compatible :

	- "qcom,msm-uart", and one of "qcom,msm-hsuart" or

	  "qcom,msm-lsuart".

- reg : offset and length of the register set for the device

	for the hsuart operating in compatible mode, there should be a

	second pair describing the gsbi registers.

- interrupts : should contain the uart interrupt.

There are two different UART blocks used in MSM devices,

"qcom,msm-hsuart" and "qcom,msm-lsuart".  The msm-serial driver is

able to handle both of these, and matches against the "qcom,msm-uart"

as the compatibility.

The registers for the "qcom,msm-hsuart" device need to specify both

register blocks, even for the common driver.

Example:

	uart@19c400000 {

		compatible = "qcom,msm-hsuart", "qcom,msm-uart";

		reg = <0x19c40000 0x1000>,

		      <0x19c00000 0x1000>;

		interrupts = <195>;

	};

* Qualcomm MSM HSUART

Required properties:

- compatible : one of:

	- "qcom,msm-lsuart-v14"

- reg : offset and length of the register set for the device.

- interrupts : should contain the uart interrupt.

Optional properties:

- qcom,config-gpio : Set this value if UART GPIOs need to be configured by driver.

set 4 if 4-wire UART used (for Tx, Rx, CTS, RFR GPIOs).

Set 1 if 2-wire UART used (for Tx, Rx GPIOs).

- qcom,<gpio-name>-gpio : handle to the GPIO node, see "gpios property" in

Documentation/devicetree/bindings/gpio/gpio.txt.

"gpio-name" can be "tx", "rx", "cts" and "rfr" based on number of UART GPIOs

need to configured.

qcom,use-pm : If present, this property will cause the device to prevent system

suspend as long as the port remains open.

- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for below properties:

    - qcom,msm_bus,name

    - qcom,msm_bus,num_cases

    - qcom,msm_bus,active_only

    - qcom,msm_bus,num_paths

    - qcom,msm_bus,vectors

Aliases:

An alias may optionally be used to bind the serial device to a tty device

(ttyHSLx) with a given line number. Aliases are of the form serial<n> where <n>

is an integer representing the line number to use. On systems with multiple

serial devices present it is recommended that an alias be defined for each such

device.

Example:

	aliases {

		serial0 = &uart0;       // This device will be called ttyHSL0

	};

	uart0: serial@19c400000 {

		compatible = "qcom,msm-lsuart-v14"

		reg = <0x19c40000 0x1000">;

		interrupts = <195>;

		qcom,config-gpio = <4>;

		qcom,tx-gpio = <&msmgpio 41 0x00>;

		qcom,rx-gpio = <&msmgpio 42 0x00>;

		qcom,cts-gpio = <&msmgpio 43 0x00>;

		qcom,rfr-gpio = <&msmgpio 44 0x00>;

		qcom,use-pm;

		qcom,msm-bus,name = "serial_uart0";

		qcom,msm-bus,num-cases = <2>;

		qcom,msm-bus,num-paths = <1>;

		qcom,msm-bus,vectors-KBps =

				<84 512 0 0>,

				<84 512 500 800>;

	};

* Qualcomm MSM HSUART

Required properties:

- compatible :

	- "qcom,msm-hsuart-v14" to be used for UARTDM Core v1.4

- reg : offset and length of the register set for both the device,

	uart core and bam core

- reg-names :

	- "core_mem" to be used as name of the uart core

	- "bam_mem" to be used as name of the bam core

- interrupts : interrupts for both the device,uart core and bam core

- interrupt-names :

	- "core_irq" to be used as uart irq

	- "bam irq" to be used as bam irq

- #interrupt-cells: Specifies the number of cells needed to encode an interrupt

		source. The type shall be a <u32> and the value shall be 1

- #address-cells: Specifies the number of cells needed to encode an address.

		The type shall be <u32> and the value shall be 0

- interrupt-parent = It is needed for interrupt mapping

- bam-tx-ep-pipe-index : BAM TX Endpoint Pipe Index for HSUART

- bam-rx-ep-pipe-index : BAM RX Endpoint Pipe Index for HSUART

BLSP has a static pipe allocation and assumes a pair-pipe for each uart core.

Pipes [2*i : 2*i+1] are allocated for UART cores where i = [0 : 5].

Hence, Minimum and Maximum permitted value of endpoint pipe index to be used

with uart core is 0 and 11 respectively.

There is one HSUART block used in MSM devices,

"qcom,msm-hsuart-v14". The msm-serial-hs driver is

able to handle this, and matches against the "qcom,msm-hsuart-v14"

as the compatibility.

The registers for the "qcom,msm-hsuart-v14" device need to specify both

register blocks - uart core and bam core.

Example:

	uart7: uart@f995d000 {

		compatible = "qcom,msm-hsuart-v14";

		reg = <0xf995d000 0x1000>,

		      <0xf9944000 0x5000>;

		reg-names = "core_mem", "bam_mem";

		interrupt-names = "core_irq", "bam_irq";

		#address-cells = <0>;

		interrupt-parent = <&uart7>;

		interrupts = <0 1>;

		#interrupt-cells = <1>;

		interrupt-map = <0 &intc 0 113 0

				1 &intc 0 239 0>

		qcom,bam-tx-ep-pipe-index = <0>;

		qcom,bam-rx-ep-pipe-index = <1>;

	};

Optional properties:

- qcom,<gpio-name>-gpio : handle to the GPIO node, see "gpios property" in

Documentation/devicetree/bindings/gpio/gpio.txt.

"gpio-name" can be "tx", "rx", "cts" and "rfr" based on number of UART GPIOs

need to configured.

Gpio's are optional if it is required to be not configured by UART driver or

case where there is nothing connected and we want to use internal loopback mode

for uart.

- qcom, wakeup_irq : UART RX GPIO IRQ line to be configured as wakeup source.

- qcom,inject-rx-on-wakeup : inject_rx_on_wakeup enables feature where on

receiving interrupt with UART RX GPIO IRQ line (i.e. above wakeup_irq property),

HSUART driver injects provided character with property rx_to_inject.

- qcom, rx-char-to-inject : The character to be inserted on wakeup.

- qcom, no-suspend-delay : This decides system to go to suspend immediately

or not

- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for

below optional properties:

    - qcom,msm_bus,name

    - qcom,msm_bus,num_cases

    - qcom,msm_bus,active_only

    - qcom,msm_bus,num_paths

    - qcom,msm_bus,vectors

Aliases :

An alias may be optionally used to bind the UART device to a TTY device

(ttyHS<alias_num>) with a given alias number. Aliases are of the form

uart<n> where <n> is an integer representing the alias number to use.

On systems with multiple UART devices present, an alias may optionally be

defined for such devices. The alias value should be from 0 to 255.

Example:

	aliases {

		uart4 = &uart7; // This device will be enumerated as ttyHS4

	};

	uart7: uart@f995d000 {

		compatible = "qcom,msm-hsuart-v14"

		reg = <0x19c40000 0x1000">,

		      <0xf9944000 0x5000>;

		reg-names = "core_mem", "bam_mem";

		interrupt-names = "core_irq", "bam_irq", "wakeup_irq";

		#address-cells = <0>;

		interrupt-parent = <&uart7>;

		interrupts = <0 1 2>;

		#interrupt-cells = <1>;

		interrupt-map-mask = <0xffffffff>;

		interrupt-map = <0 &intc 0 113 0

				1 &intc 0 239 0

				2 &msmgpio 42 0>;

		qcom,tx-gpio = <&msmgpio 41 0x00>;

		qcom,rx-gpio = <&msmgpio 42 0x00>;

		qcom,cts-gpio = <&msmgpio 43 0x00>;

		qcom,rfr-gpio = <&msmgpio 44 0x00>;

		qcom,inject-rx-on-wakeup = <1>;

		qcom,rx-char-to-inject = <0xFD>;

		qcom,bam-tx-ep-pipe-index = <0>;

		qcom,bam-rx-ep-pipe-index = <1>;

		qcom,msm-bus,name = "uart7";

		qcom,msm-bus,num-cases = <2>;

		qcom,msm-bus,num-paths = <1>;

		qcom,msm-bus,vectors-KBps =

				<84 512 0 0>,

				<84 512 500 800>;

	};

config SERIAL_MSM

	bool "MSM on-chip serial port support"

	depends on ARCH_MSM || ARCH_QCOM

	depends on ARCH_QCOM

	select SERIAL_CORE

config SERIAL_MSM_CONSOLE

	  Choose M here to compile it as a module. The module will be

	  called msm_serial_hs.

config SERIAL_MSM_HSL

	tristate "MSM UART High Speed : Legacy mode Serial Driver"

	depends on (ARM || ARM64) && ARCH_MSM

	select SERIAL_CORE

	default n

	help

	  Select this module to enable MSM high speed UART driver.

config SERIAL_MSM_HSL_CONSOLE

	bool "MSM High speed serial legacy mode console support"

	depends on SERIAL_MSM_HSL=y

	select SERIAL_CORE_CONSOLE

	default n

config SERIAL_VT8500

	bool "VIA VT8500 on-chip serial port support"

	depends on ARCH_VT8500

obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o

obj-$(CONFIG_SERIAL_MSM) += msm_serial.o

obj-$(CONFIG_SERIAL_MSM_HS) += msm_serial_hs.o

obj-$(CONFIG_SERIAL_MSM_HSL) += msm_serial_hs_lite.o

obj-$(CONFIG_SERIAL_NETX) += netx-serial.o

obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o

obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o

/* drivers/serial/msm_serial_hs_hwreg.h

 *

 * Copyright (c) 2007-2009, 2012-2014,The Linux Foundation. All rights reserved.

 * 

 * All source code in this file is licensed under the following license

 * except where indicated.

 * 

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * version 2 as published by the Free Software Foundation.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 * See the GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, you can find it at http://www.fsf.org

 */

#ifndef MSM_SERIAL_HS_HWREG_H

#define MSM_SERIAL_HS_HWREG_H

#define GSBI_CONTROL_ADDR              0x0

#define GSBI_PROTOCOL_CODE_MASK        0x30

#define GSBI_PROTOCOL_I2C_UART         0x60

#define GSBI_PROTOCOL_UART             0x40

#define GSBI_PROTOCOL_IDLE             0x0

#define TCSR_ADM_1_A_CRCI_MUX_SEL      0x78

#define TCSR_ADM_1_B_CRCI_MUX_SEL      0x7C

#define ADM1_CRCI_GSBI6_RX_SEL         0x800

#define ADM1_CRCI_GSBI6_TX_SEL         0x400

#define MSM_ENABLE_UART_CLOCK 13

#define MSM_DISABLE_UART_CLOCK 14

#define MSM_GET_UART_CLOCK_STATUS 15

enum msm_hsl_regs {

	UARTDM_MR1,

	UARTDM_MR2,

	UARTDM_IMR,

	UARTDM_SR,

	UARTDM_CR,

	UARTDM_CSR,

	UARTDM_IPR,

	UARTDM_ISR,

	UARTDM_RX_TOTAL_SNAP,

	UARTDM_RFWR,

	UARTDM_TFWR,

	UARTDM_RF,

	UARTDM_TF,

	UARTDM_MISR,

	UARTDM_DMRX,

	UARTDM_NCF_TX,

	UARTDM_DMEN,

	UARTDM_BCR,

	UARTDM_TXFS,

	UARTDM_RXFS,

	UARTDM_LAST,

};

enum msm_hs_regs {

	UART_DM_MR1 = 0x0,

	UART_DM_MR2 = 0x4,

	UART_DM_IMR = 0xb0,

	UART_DM_SR = 0xa4,

	UART_DM_CR = 0xa8,

	UART_DM_CSR = 0xa0,

	UART_DM_IPR = 0x18,

	UART_DM_ISR = 0xb4,

	UART_DM_RX_TOTAL_SNAP = 0xbc,

	UART_DM_TFWR = 0x1c,

	UART_DM_RFWR = 0x20,

	UART_DM_RF = 0x140,

	UART_DM_TF = 0x100,

	UART_DM_MISR = 0xac,

	UART_DM_DMRX = 0x34,

	UART_DM_NCF_TX = 0x40,

	UART_DM_DMEN = 0x3c,

	UART_DM_TXFS = 0x4c,

	UART_DM_RXFS = 0x50,

	UART_DM_RX_TRANS_CTRL = 0xcc,

	UART_DM_BCR = 0xc8,

};

#define UARTDM_MR1_ADDR 0x0

#define UARTDM_MR2_ADDR 0x4

/* Backward Compatability Register for UARTDM Core v1.4 */

#define UARTDM_BCR_ADDR	0xc8

/*

 * UARTDM Core v1.4 STALE_IRQ_EMPTY bit defination

 * Stale interrupt will fire if bit is set when RX-FIFO is empty

 */

#define UARTDM_BCR_TX_BREAK_DISABLE	0x1

#define UARTDM_BCR_STALE_IRQ_EMPTY	0x2

#define UARTDM_BCR_RX_DMRX_LOW_EN	0x4

#define UARTDM_BCR_RX_STAL_IRQ_DMRX_EQL	0x10

#define UARTDM_BCR_RX_DMRX_1BYTE_RES_EN	0x20

/* TRANSFER_CONTROL Register for UARTDM Core v1.4 */

#define UARTDM_RX_TRANS_CTRL_ADDR      0xcc

/* TRANSFER_CONTROL Register bits */

#define RX_STALE_AUTO_RE_EN		0x1

#define RX_TRANS_AUTO_RE_ACTIVATE	0x2

#define RX_DMRX_CYCLIC_EN		0x4

/* write only register */

#define UARTDM_CSR_115200 0xFF

#define UARTDM_CSR_57600  0xEE

#define UARTDM_CSR_38400  0xDD

#define UARTDM_CSR_28800  0xCC

#define UARTDM_CSR_19200  0xBB

#define UARTDM_CSR_14400  0xAA

#define UARTDM_CSR_9600   0x99

#define UARTDM_CSR_7200   0x88

#define UARTDM_CSR_4800   0x77

#define UARTDM_CSR_3600   0x66

#define UARTDM_CSR_2400   0x55

#define UARTDM_CSR_1200   0x44

#define UARTDM_CSR_600    0x33

#define UARTDM_CSR_300    0x22

#define UARTDM_CSR_150    0x11

#define UARTDM_CSR_75     0x00

/* write only register */

#define UARTDM_IPR_ADDR 0x18

#define UARTDM_TFWR_ADDR 0x1c

#define UARTDM_RFWR_ADDR 0x20

#define UARTDM_HCR_ADDR 0x24

#define UARTDM_DMRX_ADDR 0x34

#define UARTDM_DMEN_ADDR 0x3c

/* UART_DM_NO_CHARS_FOR_TX */

#define UARTDM_NCF_TX_ADDR 0x40

#define UARTDM_BADR_ADDR 0x44

#define UARTDM_SIM_CFG_ADDR 0x80

/* Read Only register */

#define UARTDM_TXFS_ADDR 0x4C

#define UARTDM_RXFS_ADDR 0x50

/* Register field Mask Mapping */

#define UARTDM_SR_RX_BREAK_BMSK	        BIT(6)

#define UARTDM_SR_PAR_FRAME_BMSK	BIT(5)

#define UARTDM_SR_OVERRUN_BMSK		BIT(4)

#define UARTDM_SR_TXEMT_BMSK		BIT(3)

#define UARTDM_SR_TXRDY_BMSK		BIT(2)

#define UARTDM_SR_RXRDY_BMSK		BIT(0)

#define UARTDM_CR_TX_DISABLE_BMSK	BIT(3)

#define UARTDM_CR_RX_DISABLE_BMSK	BIT(1)

#define UARTDM_CR_TX_EN_BMSK		BIT(2)

#define UARTDM_CR_RX_EN_BMSK		BIT(0)

/* UARTDM_CR channel_comman bit value (register field is bits 8:4) */

#define RESET_RX		0x10

#define RESET_TX		0x20

#define RESET_ERROR_STATUS	0x30

#define RESET_BREAK_INT		0x40

#define START_BREAK		0x50

#define STOP_BREAK		0x60

#define RESET_CTS		0x70

#define RESET_STALE_INT		0x80

#define RFR_LOW			0xD0

#define RFR_HIGH		0xE0

#define CR_PROTECTION_EN	0x100

#define STALE_EVENT_ENABLE	0x500

#define STALE_EVENT_DISABLE	0x600

#define FORCE_STALE_EVENT	0x400

#define CLEAR_TX_READY		0x300

#define RESET_TX_ERROR		0x800

#define RESET_TX_DONE		0x810

/*

 * UARTDM_CR BAM IFC comman bit value

 * for UARTDM Core v1.4

 */

#define START_RX_BAM_IFC	0x850

#define START_TX_BAM_IFC	0x860

#define UARTDM_MR1_AUTO_RFR_LEVEL1_BMSK 0xffffff00

#define UARTDM_MR1_AUTO_RFR_LEVEL0_BMSK 0x3f

#define UARTDM_MR1_CTS_CTL_BMSK 0x40

#define UARTDM_MR1_RX_RDY_CTL_BMSK 0x80

/*

 * UARTDM Core v1.4 MR2_RFR_CTS_LOOP bitmask

 * Enables internal loopback between RFR_N of

 * RX channel and CTS_N of TX channel.

 */

#define UARTDM_MR2_RFR_CTS_LOOP_MODE_BMSK	0x400

#define UARTDM_MR2_LOOP_MODE_BMSK		0x80

#define UARTDM_MR2_ERROR_MODE_BMSK		0x40

#define UARTDM_MR2_BITS_PER_CHAR_BMSK		0x30

#define UARTDM_MR2_RX_ZERO_CHAR_OFF		0x100

#define UARTDM_MR2_RX_ERROR_CHAR_OFF		0x200

#define UARTDM_MR2_RX_BREAK_ZERO_CHAR_OFF	0x100

#define UARTDM_MR2_BITS_PER_CHAR_8	(0x3 << 4)

/* bits per character configuration */

#define FIVE_BPC  (0 << 4)

#define SIX_BPC   (1 << 4)

#define SEVEN_BPC (2 << 4)

#define EIGHT_BPC (3 << 4)

#define UARTDM_MR2_STOP_BIT_LEN_BMSK 0xc

#define STOP_BIT_ONE (1 << 2)

#define STOP_BIT_TWO (3 << 2)

#define UARTDM_MR2_PARITY_MODE_BMSK 0x3

/* Parity configuration */

#define NO_PARITY 0x0

#define EVEN_PARITY 0x2

#define ODD_PARITY 0x1

#define SPACE_PARITY 0x3

#define UARTDM_IPR_STALE_TIMEOUT_MSB_BMSK 0xffffff80

#define UARTDM_IPR_STALE_LSB_BMSK 0x1f

/* These can be used for both ISR and IMR register */

#define UARTDM_ISR_TX_READY_BMSK	BIT(7)

#define UARTDM_ISR_CURRENT_CTS_BMSK	BIT(6)

#define UARTDM_ISR_DELTA_CTS_BMSK	BIT(5)

#define UARTDM_ISR_RXLEV_BMSK		BIT(4)

#define UARTDM_ISR_RXSTALE_BMSK		BIT(3)

#define UARTDM_ISR_RXBREAK_BMSK		BIT(2)

#define UARTDM_ISR_RXHUNT_BMSK		BIT(1)

#define UARTDM_ISR_TXLEV_BMSK		BIT(0)

/* Field definitions for UART_DM_DMEN*/

#define UARTDM_TX_DM_EN_BMSK 0x1

#define UARTDM_RX_DM_EN_BMSK 0x2

/*

 * UARTDM Core v1.4 bitmask

 * Bitmasks for enabling Rx and Tx BAM Interface

 */

#define UARTDM_TX_BAM_ENABLE_BMSK 0x4

#define UARTDM_RX_BAM_ENABLE_BMSK 0x8

/* Register offsets for UART Core v13 */

/* write only register */

#define UARTDM_CSR_ADDR    0x8

/* write only register */

#define UARTDM_TF_ADDR   0x70

#define UARTDM_TF2_ADDR  0x74

#define UARTDM_TF3_ADDR  0x78

#define UARTDM_TF4_ADDR  0x7c

/* write only register */

#define UARTDM_CR_ADDR 0x10

/* write only register */

#define UARTDM_IMR_ADDR 0x14

#define UARTDM_IRDA_ADDR 0x38

/* Read Only register */

#define UARTDM_SR_ADDR 0x8

/* Read Only register */

#define UARTDM_RF_ADDR   0x70

#define UARTDM_RF2_ADDR  0x74

#define UARTDM_RF3_ADDR  0x78

#define UARTDM_RF4_ADDR  0x7c

/* Read Only register */

#define UARTDM_MISR_ADDR 0x10

/* Read Only register */

#define UARTDM_ISR_ADDR 0x14

#define UARTDM_RX_TOTAL_SNAP_ADDR 0x38

#endif /* MSM_SERIAL_HS_HWREG_H */