From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Christophe Leroy <christophe.leroy@c-s.fr>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>,
linux-serial@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 05/45] tty: serial: cpm_uart - fix init when SMC is relocated
Date: Fri, 19 Jul 2019 00:12:24 -0400 [thread overview]
Message-ID: <20190719041304.18849-5-sashal@kernel.org> (raw)
In-Reply-To: <20190719041304.18849-1-sashal@kernel.org>
From: Christophe Leroy <christophe.leroy@c-s.fr>
[ Upstream commit 06aaa3d066db87e8478522d910285141d44b1e58 ]
SMC relocation can also be activated earlier by the bootloader,
so the driver's behaviour cannot rely on selected kernel config.
When the SMC is relocated, CPM_CR_INIT_TRX cannot be used.
But the only thing CPM_CR_INIT_TRX does is to clear the
rstate and tstate registers, so this can be done manually,
even when SMC is not relocated.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Fixes: 9ab921201444 ("cpm_uart: fix non-console port startup bug")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/tty/serial/cpm_uart/cpm_uart_core.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 0040c29f651a..b9e137c03fe3 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -421,7 +421,16 @@ static int cpm_uart_startup(struct uart_port *port)
clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX);
}
cpm_uart_initbd(pinfo);
- cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
+ if (IS_SMC(pinfo)) {
+ out_be32(&pinfo->smcup->smc_rstate, 0);
+ out_be32(&pinfo->smcup->smc_tstate, 0);
+ out_be16(&pinfo->smcup->smc_rbptr,
+ in_be16(&pinfo->smcup->smc_rbase));
+ out_be16(&pinfo->smcup->smc_tbptr,
+ in_be16(&pinfo->smcup->smc_tbase));
+ } else {
+ cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
+ }
}
/* Install interrupt handler. */
retval = request_irq(port->irq, cpm_uart_int, 0, "cpm_uart", port);
@@ -875,16 +884,14 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
(u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);
/*
- * In case SMC1 is being relocated...
+ * In case SMC is being relocated...
*/
-#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH)
out_be16(&up->smc_rbptr, in_be16(&pinfo->smcup->smc_rbase));
out_be16(&up->smc_tbptr, in_be16(&pinfo->smcup->smc_tbase));
out_be32(&up->smc_rstate, 0);
out_be32(&up->smc_tstate, 0);
out_be16(&up->smc_brkcr, 1); /* number of break chars */
out_be16(&up->smc_brkec, 0);
-#endif
/* Set up the uart parameters in the
* parameter ram.
@@ -898,8 +905,6 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
out_be16(&up->smc_brkec, 0);
out_be16(&up->smc_brkcr, 1);
- cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
-
/* Set UART mode, 8 bit, no parity, one stop.
* Enable receive and transmit.
*/
--
2.20.1
next prev parent reply other threads:[~2019-07-19 4:19 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 4:12 [PATCH AUTOSEL 4.9 01/45] drm/panel: simple: Fix panel_simple_dsi_probe Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 02/45] usb: core: hub: Disable hub-initiated U1/U2 Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 03/45] tty: max310x: Fix invalid baudrate divisors calculator Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 04/45] pinctrl: rockchip: fix leaked of_node references Sasha Levin
2019-07-19 4:12 ` Sasha Levin [this message]
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 06/45] drm/edid: Fix a missing-check bug in drm_load_edid_firmware() Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 07/45] drm/bridge: tc358767: read display_props in get_modes() Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 08/45] drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 09/45] memstick: Fix error cleanup path of memstick_init Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 10/45] tty/serial: digicolor: Fix digicolor-usart already registered warning Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 11/45] tty: serial: msm_serial: avoid system lockup condition Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 12/45] serial: 8250: Fix TX interrupt handling condition Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 13/45] drm/virtio: Add memory barriers for capset cache Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 14/45] phy: renesas: rcar-gen2: Fix memory leak at error paths Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 15/45] drm/rockchip: Properly adjust to a true clock in adjusted_mode Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 16/45] tty: serial_core: Set port active bit in uart_port_activate Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 17/45] usb: gadget: Zero ffs_io_data Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 18/45] powerpc/pci/of: Fix OF flags parsing for 64bit BARs Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 19/45] PCI: sysfs: Ignore lockdep for remove attribute Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 20/45] iio: st_accel: fix iio_triggered_buffer_{pre,post}enable positions Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 21/45] kbuild: Add -Werror=unknown-warning-option to CLANG_FLAGS Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 22/45] PCI: xilinx-nwl: Fix Multi MSI data programming Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 23/45] iio: iio-utils: Fix possible incorrect mask calculation Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 24/45] recordmcount: Fix spurious mcount entries on powerpc Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 25/45] mfd: core: Set fwnode for created devices Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 26/45] mfd: arizona: Fix undefined behavior Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 27/45] mfd: hi655x-pmic: Fix missing return value check for devm_regmap_init_mmio_clk Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 28/45] um: Silence lockdep complaint about mmap_sem Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 29/45] powerpc/4xx/uic: clear pending interrupt after irq type/pol change Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 30/45] RDMA/i40iw: Set queue pair state when being queried Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 31/45] serial: sh-sci: Terminate TX DMA during buffer flushing Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 32/45] serial: sh-sci: Fix TX DMA buffer flushing and workqueue races Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 33/45] PCI: tegra: Enable Relaxed Ordering only for Tegra20 & Tegra30 Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 34/45] kallsyms: exclude kasan local symbols on s390 Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 35/45] perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 36/45] RDMA/rxe: Fill in wc byte_len with IB_WC_RECV_RDMA_WITH_IMM Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 37/45] powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 38/45] f2fs: avoid out-of-range memory access Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 39/45] mailbox: handle failed named mailbox channel request Sasha Levin
2019-07-19 4:12 ` [PATCH AUTOSEL 4.9 40/45] powerpc/eeh: Handle hugepages in ioremap space Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.9 41/45] sh: prevent warnings when using iounmap Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.9 42/45] mm/kmemleak.c: fix check for softirq context Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.9 43/45] 9p: pass the correct prototype to read_cache_page Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.9 44/45] mm/mmu_notifier: use hlist_add_head_rcu() Sasha Levin
2019-07-19 4:13 ` [PATCH AUTOSEL 4.9 45/45] locking/lockdep: Fix lock used or unused stats error Sasha Levin
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