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Diffstat (limited to 'zephyr/shim/src/i2c.c')
| -rw-r--r-- | zephyr/shim/src/i2c.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/zephyr/shim/src/i2c.c b/zephyr/shim/src/i2c.c deleted file mode 100644 index 3dba7cde38..0000000000 --- a/zephyr/shim/src/i2c.c +++ /dev/null @@ -1,135 +0,0 @@ -/* Copyright 2020 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <sys/util.h> - -#include "console.h" -#include "i2c.h" -#include "i2c/i2c.h" - -/* - * The named-i2c-ports node is required by the I2C shim - */ -#if !DT_NODE_EXISTS(DT_PATH(named_i2c_ports)) -#error I2C shim requires the named-i2c-ports node to be defined. -#endif - -/* - * Initialize device bindings in i2c_devices. - * This macro should be called from within DT_FOREACH_CHILD. - */ -#define INIT_DEV_BINDING(id) \ - [I2C_PORT(id)] = DEVICE_DT_GET(DT_PHANDLE(id, i2c_port)), - -#define INIT_REMOTE_PORTS(id) \ - [I2C_PORT(id)] = DT_PROP_OR(id, remote_port, -1), - -#define I2C_PORT_INIT(id) \ - { \ - .name = DT_LABEL(id), \ - .port = I2C_PORT(id), \ - }, -/* - * Long term we will not need these, for now they're needed to get things to - * build since these extern symbols are usually defined in - * board/${BOARD}/board.c. - * - * Since all the ports will eventually be handled by device tree. This will - * be removed at that point. - */ -const struct i2c_port_t i2c_ports[] = { - DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), I2C_PORT_INIT) -}; -const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); -static const int i2c_remote_ports[I2C_PORT_COUNT] = { - DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), INIT_REMOTE_PORTS) -}; -static int i2c_physical_ports[I2C_PORT_COUNT]; - -static const struct device *i2c_devices[I2C_PORT_COUNT] = { - DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), INIT_DEV_BINDING) -}; - -static int init_device_bindings(const struct device *device) -{ - ARG_UNUSED(device); - - /* - * The EC application may lock the I2C bus for more than a single - * I2C transaction. Initialize the i2c_physical_ports[] array to map - * each named-i2c-ports child to the physical bus assignment. - * - * TODO(b/199918263): zephyr: Optimize I2C mutexes - * Modify the port_mutex[] array defined by i2c_controller.c - * so that only mutexes for unique physical ports are created to - * save space. - */ - i2c_physical_ports[0] = 0; - for (int child = 1; child < I2C_PORT_COUNT; child++) { - for (int phys_port = 0; phys_port < I2C_PORT_COUNT; - phys_port++) { - if (i2c_devices[child] == i2c_devices[phys_port]) { - i2c_physical_ports[child] = phys_port; - break; - } - } - } - return 0; -} -SYS_INIT(init_device_bindings, POST_KERNEL, 51); - -const struct device *i2c_get_device_for_port(const int port) -{ - if (port < 0 || port >= I2C_PORT_COUNT) - return NULL; - return i2c_devices[port]; -} - -int i2c_get_port_from_remote_port(int remote_port) -{ - for (int port = 0; port < I2C_PORT_COUNT; port++) { - if (i2c_remote_ports[port] == remote_port) - return port; - } - - /* - * Remote port is not defined, return 1:1 mapping to support TCPC - * firmware updates, which always query the EC for the correct I2C - * port number. - */ - return remote_port; -} - -int i2c_get_physical_port(int enum_port) -{ - int i2c_port = i2c_physical_ports[enum_port]; - - /* - * Return -1 for caller if physical port is not defined or the - * port number is out of port_mutex space. - * Please ensure the caller won't change anything if -1 received. - */ - return (i2c_port < I2C_PORT_COUNT) ? i2c_port : -1; -} - -#ifdef CONFIG_PLATFORM_EC_CONSOLE_CMD_I2C_PORTMAP -static int command_i2c_portmap(int argc, char **argv) -{ - int i; - - ccprintf("Zephyr physical I2C ports (%d):\n", I2C_PORT_COUNT); - for (i = 0; i < I2C_PORT_COUNT; i++) { - ccprintf(" %d : %d\n", i, i2c_physical_ports[i]); - } - ccprintf("Zephyr remote I2C ports (%d):\n", I2C_PORT_COUNT); - for (i = 0; i < I2C_PORT_COUNT; i++) { - ccprintf(" %d : %d\n", i, i2c_remote_ports[i]); - } - - return EC_RES_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(i2c_portmap, command_i2c_portmap, NULL, - "Show I2C port mapping"); -#endif /* CONFIG_PLATFORM_EC_CONSOLE_CMD_I2C_PORTMAP */ |