[src/trunk]: src/sys/arch/arm/nvidia add external function for writing to dvc...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d3ee5d0759d5
branches:  trunk
changeset: 338596:d3ee5d0759d5
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun May 31 14:41:59 2015 +0000

description:
add external function for writing to dvc (I2C5) devices

diffstat:

 sys/arch/arm/nvidia/tegra_i2c.c |  21 +++++++++++++++++++--
 sys/arch/arm/nvidia/tegra_var.h |   4 +++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diffs (57 lines):

diff -r 8824c626ed28 -r d3ee5d0759d5 sys/arch/arm/nvidia/tegra_i2c.c
--- a/sys/arch/arm/nvidia/tegra_i2c.c   Sun May 31 10:50:04 2015 +0000
+++ b/sys/arch/arm/nvidia/tegra_i2c.c   Sun May 31 14:41:59 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_i2c.c,v 1.4 2015/05/17 01:26:22 jmcneill Exp $ */
+/* $NetBSD: tegra_i2c.c,v 1.5 2015/05/31 14:41:59 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "locators.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_i2c.c,v 1.4 2015/05/17 01:26:22 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_i2c.c,v 1.5 2015/05/31 14:41:59 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -418,3 +418,20 @@
 
        return tegra_i2c_wait(sc, flags);
 }
+
+void
+tegra_i2c_dvc_write(uint8_t addr, uint32_t data, size_t datalen)
+{
+       bus_space_tag_t bst = &armv7_generic_bs_tag;
+       bus_space_handle_t bsh;
+
+       bus_space_subregion(bst, tegra_apb_bsh, TEGRA_I2C5_OFFSET,
+           TEGRA_I2C5_SIZE, &bsh);
+
+       bus_space_write_4(bst, bsh, I2C_CMD_ADDR0_REG, addr << 1);
+       bus_space_write_4(bst, bsh, I2C_CMD_DATA1_REG, data);
+       bus_space_write_4(bst, bsh, I2C_CNFG_REG,
+           __SHIFTIN(datalen - 1, I2C_CNFG_LENGTH) |
+           I2C_CNFG_NEW_MASTER_FSM |
+           I2C_CNFG_SEND);
+}
diff -r 8824c626ed28 -r d3ee5d0759d5 sys/arch/arm/nvidia/tegra_var.h
--- a/sys/arch/arm/nvidia/tegra_var.h   Sun May 31 10:50:04 2015 +0000
+++ b/sys/arch/arm/nvidia/tegra_var.h   Sun May 31 14:41:59 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_var.h,v 1.20 2015/05/30 13:25:55 jmcneill Exp $ */
+/* $NetBSD: tegra_var.h,v 1.21 2015/05/31 14:41:59 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -140,6 +140,8 @@
 void   tegra_pmc_remove_clamping(u_int);
 void   tegra_pmc_hdmi_enable(void);
 
+void   tegra_i2c_dvc_write(uint8_t, uint32_t, size_t);
+
 psize_t        tegra_mc_memsize(void);
 
 void   tegra_xusbpad_sata_enable(void);