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- 24 May, 2015 4 commits
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Qipan Li authored
add overrun error's flag mark and parity's counter, we can show the statistic from procfs node. BTW, let the indentation of stick bits configuration look better. Signed-off-by:
Qipan Li <Qipan.Li@csr.com> Signed-off-by:
Barry Song <Baohua.Song@csr.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Qipan Li authored
In special condition, when cpu schedule into rx_tmo_process_tl or rx_dma_complete_tl and all the receive dma tasks have done, it will go into endless loop because no dma task cookie status be changed. Signed-off-by:
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Qipan Li authored
>From HW spec, when rxfifo's data is less than AFC_RX_THD(RX threshhold), RTS signal is active. otherwise, RTS signal is inactive. Crrently the RX threshhold is set as zero, so RTS has no chance to be active. This patch replaces the default 0 by a positive number. Signed-off-by:
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Qipan Li authored
differentiate difference port types by re-defining the status MARCO or putting HW differences into private data of the related ports. Signed-off-by:
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- 10 May, 2015 2 commits
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Qipan Li authored
In SiRF platform, there are different fifo size of uart and usp, with the fifosize configuration changes in different chips, we can not use port line to decide how to check FIFO full,empty and level. There is a direct mapping between FIFO HW register layout with fifo size, so move to use fifosize as the input to check fifo status. Signed-off-by:
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Qipan Li authored
In different platform of SiRF SoCs, there is no same uart and usp-uart numbers, it is not convenient to use hard-coded ports array and port lines. here we drop the hard-coded ports table , and drop "cell-index". then move to use alias id to get line. for example: aliases { serial0 = &uart0; serial1 = &uart1; serial2 = &uart2; serial3 = &uart3; serial4 = &uart4; serial5 = &uart5; serial6 = &uart6; serial9 = &usp2; }; at the same, enlarge the max port number according to the chip with the most UART. Signed-off-by:
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- 06 May, 2015 2 commits
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Qipan Li authored
Signed-off-by:
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Qipan Li authored
This reverts commit 52bec4ed("serial: sirf: add a new uart type support"). we misunderstood the clock dependency in atlas7. Actually involved several clocks are in a tree structure. we still only need to take the leaf clock node for BT uarts. Signed-off-by:
Barry Song <Barry.Song@csr.com> Signed-off-by:
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- 26 Mar, 2015 1 commit
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Fabian Frederick authored
of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by:
Fabian Frederick <fabf@skynet.be> Acked-by:
Peter Korsgaard <peter@korsgaard.com> Acked-by:
Timur Tabi <timur@tabi.org> Acked-by:
Patrice Chotard <patrice.chotard@st.com> Signed-off-by:
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- 09 Jan, 2015 1 commit
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Barry Song authored
MARCO will not be supported any more and the project was dropped. it has been replaced by CSR atlas7. Signed-off-by:
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- 26 Nov, 2014 1 commit
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Qipan Li authored
in CSR A7DA SoC, uart6 located at BT module and it need multiple clock sources, so for "sirf,marco-bt-uart" compatible uarts, drivers take 3 clock sources and enable them. this patch also replaces clk_get by devm_clk_get function and fix DT binding document in which we missed to fix when we added marco platform in commit 909102db "serial: sirf: add support for Marco chip". Signed-off-by:
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- 20 Oct, 2014 1 commit
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Wolfram Sang authored
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by:Wolfram Sang <wsa@the-dreams.de>
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- 10 Jul, 2014 1 commit
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Qipan Li authored
the current codes send 1 bytes, then after getting TX done interrupt, send subsequent bytes. it causes redundant interrupts. for example, if we have 3 bytes in TX buffer, the TX flow is: 1. send 1 byte 2. get TX down interrupt 3. send the left 2 bytes 4. get TX down interrupt this patch moves to send more bytes and decrease interrupts, the new flow is: 1. send 3 bytes 2. get TX down interrupt Signed-off-by:
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- 19 Jun, 2014 1 commit
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Peter Hurley authored
If IGNBRK is set without either BRKINT or PARMRK set, some uart drivers send a 0x00 byte for BREAK without the TTYBREAK flag to the line discipline, when it should send either nothing or the TTYBREAK flag set. This happens because the read_status_mask masks out the BI condition, which uart_insert_char() then interprets as a normal 0x00 byte. SUS v3 is clear regarding the meaning of IGNBRK; Section 11.2.2, General Terminal Interface - Input Modes, states: "If IGNBRK is set, a break condition detected on input shall be ignored; that is, not put on the input queue and therefore not read by any process." Fix read_status_mask to include the BI bit if IGNBRK is set; the lsr status retains the BI bit if a BREAK is recv'd, which is subsequently ignored in uart_insert_char() when masked with the ignore_status_mask. Affected drivers: 8250 - all serial_txx9 mfd amba-pl010 amba-pl011 atmel_serial bfin_uart dz ip22zilog max310x mxs-auart netx-serial pnx8xxx_uart pxa sb1250-duart sccnxp serial_ks8695 sirfsoc_uart st-asc vr41xx_siu zs sunzilog fsl_lpuart sunsab ucc_uart bcm63xx_uart sunsu efm32-uart pmac_zilog mpsc msm_serial m32r_sio Unaffected drivers: omap-serial rp2 sa1100 imx icom Annotated for fixes: altera_uart mcf Drivers without break detection: 21285 xilinx-uartps altera_jtaguart apbuart arc-uart clps711x max3100 uartlite msm_serial_hs nwpserial lantiq vt8500_serial Unknown: samsung mpc52xx_uart bfin_sport_uart cpm_uart/core Fixes: Bugzilla #71651, '8250_core.c incorrectly handles IGNBRK flag' Reported-by:
Ivan <athlon_@mail.ru> Signed-off-by:
Peter Hurley <peter@hurleysoftware.com> Signed-off-by:
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- 29 May, 2014 1 commit
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Daniel Thompson authored
After 07d410e0) serial: sirf: fix spinlock deadlock issue it is no longer possiblet to compile this driver. The rename of one of the spinlocks is faulty. After looking at the original patch I believe this is the correct fix. Compile tested using ARM's multi_v7_defconfig Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Qipan Li <Qipan.Li@csr.com> Signed-off-by:
Daniel Thompson <daniel.thompson@linaro.org> Acked-by:
Barry Song <baohua@kernel.org> Signed-off-by:
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- 28 May, 2014 2 commits
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Qipan Li authored
commit fb78b811 provide a workaround for kernel panic, but bring potential deadlock risk. that is in sirfsoc_rx_tmo_process_tl while enter into sirfsoc_uart_pio_rx_chars cpu hold uart_port->lock, if uart interrupt comes cpu enter into sirfsoc_uart_isr and deadlock occurs in getting uart_port->lock. the patch replace spin_lock version to spin_lock_irq* version to avoid spinlock dead lock issue. let function tty_flip_buffer_push in tasklet outof spin_lock_irq* protect area to avoid add the pair of spin_lock and spin_unlock for tty_flip_buffer_push. BTW drop self defined unused spinlock protect of tx_lock/rx_lock. 56274.220464] BUG: spinlock lockup suspected on CPU#0, swapper/0/0 [56274.223648] lock: 0xc05d9db0, .magic: dead4ead, .owner: swapper/0/0, .owner_cpu: 0 [56274.231278] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G O 3.10.35 #1 [56274.238241] [<c0015530>] (unwind_backtrace+0x0/0xf4) from [<c00120d8>] (show_stack+0x10/0x14) [56274.246742] [<c00120d8>] (show_stack+0x10/0x14) from [<c01b11b0>] (do_raw_spin_lock+0x110/0x184) [56274.255501] [<c01b11b0>] (do_raw_spin_lock+0x110/0x184) from [<c02124c8>] (sirfsoc_uart_isr+0x20/0x42c) [56274.264874] [<c02124c8>] (sirfsoc_uart_isr+0x20/0x42c) from [<c0075790>] (handle_irq_event_percpu+0x54/0x17c) [56274.274758] [<c0075790>] (handle_irq_event_percpu+0x54/0x17c) from [<c00758f4>] (handle_irq_event+0x3c/0x5c) [56274.284561] [<c00758f4>] (handle_irq_event+0x3c/0x5c) from [<c0077fa0>] (handle_level_irq+0x98/0xfc) [56274.293670] [<c0077fa0>] (handle_level_irq+0x98/0xfc) from [<c0074f44>] (generic_handle_irq+0x2c/0x3c) [56274.302952] [<c0074f44>] (generic_handle_irq+0x2c/0x3c) from [<c000ef80>] (handle_IRQ+0x40/0x90) [56274.311706] [<c000ef80>] (handle_IRQ+0x40/0x90) from [<c000dc80>] (__irq_svc+0x40/0x70) [56274.319697] [<c000dc80>] (__irq_svc+0x40/0x70) from [<c038113c>] (_raw_spin_unlock_irqrestore+0x10/0x48) [56274.329158] [<c038113c>] (_raw_spin_unlock_irqrestore+0x10/0x48) from [<c0200034>] (tty_port_tty_get+0x58/0x90) [56274.339213] [<c0200034>] (tty_port_tty_get+0x58/0x90) from [<c0212008>] (sirfsoc_uart_pio_rx_chars+0x1c/0xc8) [56274.349097] [<c0212008>] (sirfsoc_uart_pio_rx_chars+0x1c/0xc8) from [<c0212ef8>] (sirfsoc_rx_tmo_process_tl+0xe4/0x1fc) [56274.359853] [<c0212ef8>] (sirfsoc_rx_tmo_process_tl+0xe4/0x1fc) from [<c0027c04>] (tasklet_action+0x84/0x114) [56274.369739] [<c0027c04>] (tasklet_action+0x84/0x114) from [<c0027db4>] (__do_softirq+0x120/0x200) [56274.378585] [<c0027db4>] (__do_softirq+0x120/0x200) from [<c0027f44>] (do_softirq+0x54/0x5c) [56274.386998] [<c0027f44>] (do_softirq+0x54/0x5c) from [<c00281ec>] (irq_exit+0x9c/0xd0) [56274.394899] [<c00281ec>] (irq_exit+0x9c/0xd0) from [<c000ef84>] (handle_IRQ+0x44/0x90) [56274.402790] [<c000ef84>] (handle_IRQ+0x44/0x90) from [<c000dc80>] (__irq_svc+0x40/0x70) [56274.410774] [<c000dc80>] (__irq_svc+0x40/0x70) from [<c0288af4>] (cpuidle_enter_state+0x50/0xe0) [56274.419532] [<c0288af4>] (cpuidle_enter_state+0x50/0xe0) from [<c0288c34>] (cpuidle_idle_call+0xb0/0x148) [56274.429080] [<c0288c34>] (cpuidle_idle_call+0xb0/0x148) from [<c000f3ac>] (arch_cpu_idle+0x8/0x38) [56274.438016] [<c000f3ac>] (arch_cpu_idle+0x8/0x38) from [<c0059344>] (cpu_startup_entry+0xfc/0x140) [56274.446956] [<c0059344>] (cpu_startup_entry+0xfc/0x140) from [<c04a3a54>] (start_kernel+0x2d8/0x2e4) Signed-off-by:
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Barry Song authored
All SiRFSoC UART registers are in 32-bits. If we use writeb for TXFIFO, actually all of 32-bits are still written, for TXTIFO, only low 8-bits are valid, so in prima2&atlas6, this causes no problem. But in the new atlas7, using writeb to write UART registers will cause an imprecise data abort as HW does check the "wrong" writeb. So move to writel and this also makes the code consistent with sirfsoc_uart_pio_tx_chars() in which we use writel. Signed-off-by:
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- 13 Feb, 2014 2 commits
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Qipan Li authored
instead of using sirf specific dma channel property like "sirf,uart-dma-rx-channel" and "sirf,uart-dma-tx-channel", here we move to use generic dma dt-binding to get the channel like: - sirf,uart-dma-rx-channel = <21>; - sirf,uart-dma-tx-channel = <2>; + dmas = <&dmac1 5>, <&dmac0 2>; + dma-names = "rx", "tx"; and we move dma_request_channel() to dma_request_slave_channel(), we don't need to call sirfsoc dma filter function sirfsoc_dma_filter_id() again. Signed-off-by:
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Qipan Li authored
commit 8b9ade9f coming from Viresh Kumar "tty: serial: sirfsoc: drop uart_port->lock before calling tty_flip_buffer_push()" broke sirfsoc uart driver by knic: [ 5.129122] BUG: spinlock already unlocked on CPU#0, ip6tables/1331 [ 5.132554] lock: sirfsoc_uart_ports+0x4/0x8a0, .magic: dead4ead, .owner: <none>/-1, .owner_cpu: -1 [ 5.141651] CPU: 0 PID: 1331 Comm: ip6tables Tainted: G W O 3.10.16 #3 [ 5.148866] [<c0013528>] (unwind_backtrace+0x0/0xe0) from [<c0010e70>] (show_stack+0x10/0x14) [ 5.157362] [<c0010e70>] (show_stack+0x10/0x14) from [<c01a5e68>] (do_raw_spin_unlock+0x40/0xc8) [ 5.166125] [<c01a5e68>] (do_raw_spin_unlock+0x40/0xc8) from [<c03ff8b4>] (_raw_spin_unlock+0x8/0x40) [ 5.175322] [<c03ff8b4>] (_raw_spin_unlock+0x8/0x40) from [<c0203fcc>] (sirfsoc_uart_pio_rx_chars+0xa4/0xc0) [ 5.185120] [<c0203fcc>] (sirfsoc_uart_pio_rx_chars+0xa4/0xc0) from [<c0204fb8>] (sirfsoc_rx_tmo_process_tl+0xdc/0x1e0) [ 5.195875] [<c0204fb8>] (sirfsoc_rx_tmo_process_tl+0xdc/0x1e0) from [<c0024b50>] (tasklet_action+0x8c/0xec) [ 5.205673] [<c0024b50>] (tasklet_action+0x8c/0xec) from [<c00242a8>] (__do_softirq+0xec/0x1d4) [ 5.214347] [<c00242a8>] (__do_softirq+0xec/0x1d4) from [<c0024428>] (do_softirq+0x48/0x54) [ 5.222674] [<c0024428>] (do_softirq+0x48/0x54) from [<c0024690>] (irq_exit+0x74/0xc0) [ 5.230573] [<c0024690>] (irq_exit+0x74/0xc0) from [<c000e1e8>] (handle_IRQ+0x6c/0x90) [ 5.238465] [<c000e1e8>] (handle_IRQ+0x6c/0x90) from [<c000d500>] (__irq_svc+0x40/0x70) [ 5.246446] [<c000d500>] (__irq_svc+0x40/0x70) from [<c0092e7c>] (mark_page_accessed+0xc/0x68) [ 5.255034] [<c0092e7c>] (mark_page_accessed+0xc/0x68) from [<c00a2a4c>] (unmap_single_vma+0x3bc/0x550) [ 5.264402] [<c00a2a4c>] (unmap_single_vma+0x3bc/0x550) from [<c00a3b4c>] (unmap_vmas+0x44/0x54) [ 5.273164] [<c00a3b4c>] (unmap_vmas+0x44/0x54) from [<c00a81a8>] (exit_mmap+0xc4/0x1e0) [ 5.281233] [<c00a81a8>] (exit_mmap+0xc4/0x1e0) from [<c001bb78>] (mmput+0x3c/0xdc) [ 5.288868] [<c001bb78>] (mmput+0x3c/0xdc) from [<c0021b0c>] (do_exit+0x30c/0x828) [ 5.296413] [<c0021b0c>] (do_exit+0x30c/0x828) from [<c0022dac>] (do_group_exit+0x4c/0xb0) [ 5.304653] [<c0022dac>] (do_group_exit+0x4c/0xb0) from [<c0022e20>] (__wake_up_parent+0x0/0x18) Root cause: the commit dropped uart_port->lock before calling tty_flip_buffer_push(), but in sirfsoc-uart, sirfsoc_uart_pio_rx_chars() can be called by sirfsoc_rx_tmo_process_tl(). here uart_port->lock has not been taken yet. so that caused unpaired lock/unlock. Solution: This patch is doing a quick fix for that, it adds spin_lock/unlock(&port->lock) protect to sirfsoc_uart_pio_rx_chars() in sirfsoc_rx_tmo_process_tl() to keep spin_lock/unlock in pair. Signed-off-by:
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- 08 Jan, 2014 3 commits
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Qipan Li authored
In rx dma-callback it calls tasklet_schedule, if the tasklet be scheduled after all the dma-callback in the rx dma channel, current check condition in the tasklet will not do fetch dma buffer into tty because tx_issued is equal with tx_completed, so as timeout tasklet does. so we check whether we should fetch the whole dma buffer into tty according to the status of transactions in rx dma channel. Signed-off-by:
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Qipan Li authored
this patch provides PM entry of uart_ops, then drop clk enable and disable because serial core will do it. the patch also fixes the issue that uart hang in resume caused by not-enabled clock. Signed-off-by:
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Qipan Li authored
use SET_SYSTEM_SLEEP_PM_OPS to initialize suspend/resume functions instead of legacy suspend and resume entries of platform_driver. this will add hibernation support automatically as suspend to disk entries are also set. Signed-off-by:
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- 26 Sep, 2013 1 commit
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Qipan Li authored
In rx timeout ISR and tasklet, we don't issue new dma desc as rx_done ISR will do that. Signed-off-by:
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- 27 Aug, 2013 3 commits
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Qipan Li authored
SiRFprimaII has three uart ports and three USP-based ports, so there are totally six lines instead of five. Signed-off-by:
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Qipan Li authored
this patch clears some magic numbers for offset and bitshift of USP registers. Signed-off-by:
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Viresh Kumar authored
The current driver triggers a lockdep warning for if tty_flip_buffer_push() is called with uart_port->lock locked. This never shows up on UP kernels and comes up only on SMP kernels. Crash looks like this (produced with samsung.c driver): ----- [<c0014d58>] (unwind_backtrace+0x0/0xf8) from [<c0011908>] (show_stack+0x10/0x14) [<c0011908>] (show_stack+0x10/0x14) from [<c035da34>] (dump_stack+0x6c/0xac) [<c035da34>] (dump_stack+0x6c/0xac) from [<c01b59ac>] (do_raw_spin_unlock+0xc4/0xd8) [<c01b59ac>] (do_raw_spin_unlock+0xc4/0xd8) from [<c03627e4>] (_raw_spin_unlock_irqrestore+0xc/0) [<c03627e4>] (_raw_spin_unlock_irqrestore+0xc/0x38) from [<c020a1a8>] (s3c24xx_serial_rx_chars+0) [<c020a1a8>] (s3c24xx_serial_rx_chars+0x12c/0x260) from [<c020aae8>] (s3c64xx_serial_handle_irq+) [<c020aae8>] (s3c64xx_serial_handle_irq+0x48/0x60) from [<c006aaa0>] (handle_irq_event_percpu+0x) [<c006aaa0>] (handle_irq_event_percpu+0x50/0x194) from [<c006ac20>] (handle_irq_event+0x3c/0x5c) [<c006ac20>] (handle_irq_event+0x3c/0x5c) from [<c006d864>] (handle_fasteoi_irq+0x80/0x13c) [<c006d864>] (handle_fasteoi_irq+0x80/0x13c) from [<c006a4a4>] (generic_handle_irq+0x20/0x30) [<c006a4a4>] (generic_handle_irq+0x20/0x30) from [<c000f454>] (handle_IRQ+0x38/0x94) [<c000f454>] (handle_IRQ+0x38/0x94) from [<c0008538>] (gic_handle_irq+0x34/0x68) [<c0008538>] (gic_handle_irq+0x34/0x68) from [<c00123c0>] (__irq_svc+0x40/0x70) Exception stack(0xc04cdf70 to 0xc04cdfb8) df60: 00000000 00000000 0000166e 00000000 df80: c04cc000 c050278f c050278f 00000001 c04d444c 410fc0f4 c03649b0 00000000 dfa0: 00000001 c04cdfb8 c000f758 c000f75c 60070013 ffffffff [<c00123c0>] (__irq_svc+0x40/0x70) from [<c000f75c>] (arch_cpu_idle+0x28/0x30) [<c000f75c>] (arch_cpu_idle+0x28/0x30) from [<c0054888>] (cpu_startup_entry+0x5c/0x148) [<c0054888>] (cpu_startup_entry+0x5c/0x148) from [<c0497aa4>] (start_kernel+0x334/0x38c) BUG: spinlock lockup suspected on CPU#0, kworker/0:1/360 lock: s3c24xx_serial_ports+0x1d8/0x370, .magic: dead4ead, .owner: <none>/-1, .owner_cpu: -1 CPU: 0 PID: 360 Comm: kworker/0:1 Not tainted 3.11.0-rc6-next-20130819-00003-g75485f1 #2 Workqueue: events flush_to_ldisc [<c0014d58>] (unwind_backtrace+0x0/0xf8) from [<c0011908>] (show_stack+0x10/0x14) [<c0011908>] (show_stack+0x10/0x14) from [<c035da34>] (dump_stack+0x6c/0xac) [<c035da34>] (dump_stack+0x6c/0xac) from [<c01b581c>] (do_raw_spin_lock+0x100/0x17c) [<c01b581c>] (do_raw_spin_lock+0x100/0x17c) from [<c03628a0>] (_raw_spin_lock_irqsave+0x20/0x28) [<c03628a0>] (_raw_spin_lock_irqsave+0x20/0x28) from [<c0203224>] (uart_start+0x18/0x34) [<c0203224>] (uart_start+0x18/0x34) from [<c01ef890>] (__receive_buf+0x4b4/0x738) [<c01ef890>] (__receive_buf+0x4b4/0x738) from [<c01efb44>] (n_tty_receive_buf2+0x30/0x98) [<c01efb44>] (n_tty_receive_buf2+0x30/0x98) from [<c01f2ba8>] (flush_to_ldisc+0xec/0x138) [<c01f2ba8>] (flush_to_ldisc+0xec/0x138) from [<c0031af0>] (process_one_work+0xfc/0x348) [<c0031af0>] (process_one_work+0xfc/0x348) from [<c0032138>] (worker_thread+0x138/0x37c) [<c0032138>] (worker_thread+0x138/0x37c) from [<c0037a7c>] (kthread+0xa4/0xb0) [<c0037a7c>] (kthread+0xa4/0xb0) from [<c000e5f8>] (ret_from_fork+0x14/0x3c) ----- Release the port lock before calling tty_flip_buffer_push() and reacquire it after the call. Similar stuff was already done for few other drivers in the past, like: commit 2389b272 Author: Thomas Gleixner <tglx@linutronix.de> Date: Tue May 29 21:53:50 2007 +0100 [ARM] 4417/1: Serial: Fix AMBA drivers locking Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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- 20 Aug, 2013 3 commits
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Qipan Li authored
if we get the valid dma channels from dts, move to use dmaengine to do rx/tx. because the dma hardware requires dma address and length to be 4bytes aligned, in this driver, we will still use PIO for non-aligned bytes, and use dma for aligned bytes. for rx, to keep the dmaengine always active, we use double-buffer, so we issue two dma_desc at first, and maintain the status of both 1. dma transfer done: update in rx dma finish callback 2. dma buffer is inserted into tty: update in rx dma finish tasklet and rx timeout tasklet so we re-issue the dma_desc only if both 1&2 are finished. for tx, as we know the actual length for every transfer, we don't need the above double buffering. Signed-off-by:
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Qipan Li authored
startup_uart_controller() loses namespace, this patch drops the function directly and move the content into sirfsoc_uart_startup(). Signed-off-by:
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Qipan Li authored
fix the typo in commit 2eb5618d which uses two gpios for rts/cts. Signed-off-by:
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- 15 Aug, 2013 2 commits
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Qipan Li authored
for USP-based UART, we use two gpios as RTS and CST pins. Signed-off-by:
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Barry Song authored
pinctrl core will get default pinmux, so drop it in the sirfsoc serial driver. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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- 12 Aug, 2013 3 commits
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Jingoo Han authored
These local symbols are used only in this file. Fix the following sparse warnings: drivers/tty/serial/sirfsoc_uart.c:147:6: warning: symbol 'sirfsoc_uart_start_tx' was not declared. Should it be static? drivers/tty/serial/sirfsoc_uart.c:636:5: warning: symbol 'sirfsoc_uart_probe' was not declared. Should it be static? Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Acked-by:
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Qipan Li authored
Universal Serial Ports (USP) can be used as PCM, UART, SPI, I2S etc. this makes the USP work as UART. the basic work flow is same with UART controller, the main difference will be offset of registers and bits. this patch makes the old sirfsoc uart driver support both sirf UART and USP-based UART by making their differences become private data. Signed-off-by:
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Barry Song authored
the marco and coming new CSR multiple SoCs have SET/CLR pair for INTEN registers to avoid some read-modify-write. this patch adds support for this and make the driver support current up and coming mp SoCs. Signed-off-by:
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- 26 Jul, 2013 1 commit
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d063 (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
Tony Prisk <linux@prisktech.co.nz> Acked-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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- 06 Jun, 2013 1 commit
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Alexey Khoroshilov authored
If pinctrl_get_select_default() fails, sirfsoc_uart_probe() returns IS_ERR(result) instead of PTR_ERR(result). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by:
Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by:
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- 23 Apr, 2013 1 commit
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Arnd Bergmann authored
This fixes building the sirfsorc-uart driver as a loadable module, which uses an incorrect MODULE_DEVICE_TABLE, by changing the reference to the correct symbol. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by:
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- 18 Jan, 2013 1 commit
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Barry Song authored
The fast lookup table to set baudrate is only right when ioclk is 150MHz. for most platforms, ioclk is 150MHz, but some boards might set ioclk to other frequency. so re-calc the clk_div_reg when ioclk is not 150MHz. this patch also gets clk in probe and puts it in remove. Signed-off-by:
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- 16 Jan, 2013 2 commits
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Jiri Slaby authored
Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. Now, the one where most of tty_port_tty_get gets removed: tty_flip_buffer_push. IOW we also closed all the races in drivers not using tty_port_tty_get at all yet. Also we move tty_flip_buffer_push declaration from include/linux/tty.h to include/linux/tty_flip.h to all others while we are changing it anyway. Signed-off-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
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Barry Song authored
CSR SiRFmarco's UART IP is same with SiRFprimaII except that it has two more uart ports. this patch makes the old driver support new SiRFmarco as well: 1. add .compatible = "sirf,marco-uart" to OF match table 2. add two ports in the port table 3. take spin_lock in isr to avoid the conflict of threads opening uart on CPU1 and isr running on CPU0. For 3, we did see some problems on SiRFmarco as SiRFmarco is a SMP SoC but the old SiRFprimaII is UP. Signed-off-by:
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